Breakups

Calvin Klein's ex-boy toy Nick Gruber is pulling the plug on his planned tell-all book about his tumultuous relationship with the fashion mogul ... telling TMZ that the $375,000 payday wasn't worth it.

The 23-year-old former underwear model has been fielding several offers over the last couple months from NY publishing houses to write his memoir, tentatively titled "What Came Between Me and My Calvin." The book was supposed to blow the lid off the dirty details in the duo's love affair.

But Gruber tells TMZ he's had a change of heart and that despite the lucrative deals ($375,000 was the highest) he just couldn't pull the trigger. Gruber told us, "I decided I no longer want to do that anymore. There was a ton of interest, but I just did not want to hurt him or others. I am a good person, not a mean person."

He adds, "Love is a beautiful thing. Money doesn't matter at all."

Time to fire up the Justin Bieber/Selena Gomez rumor mill ... because Selena was spotted returning home yesterday after hanging out allllll night with the Biebs.

The on-again/off-again (to the infinity power) couple hasn't actually been seen together in some time ... and we're told this is the first time the two have seen each other in a month.

It's clear these two young lovebirds just don't know how to quit each other.

Conservatorship wonder Britney Spears is finally free ... of her $90K engagement bling.

For the first time since breaking it off with her ex-fiance Jason Trawick, the newly single pop diva was spotted in L.A. this weekend minus the huge Neil Lane 3.5 carat rock.

As TMZ previously reported, Jason didn't have to ask for the pricey bauble back as Britney returned it all on her own.

With her lucrative Vegas deal in the works, she can buy a new rock whenever she wants.

Justin Bieber isn't the only one who can belt out Justin Timberlake's classic "Cry Me a River" ... turns out his currently ex-girlfriend, Selena Gomez, has a version of her own up her sleeve.

You may remember ... back in November, after one of their numerous splits, Justin performed the JT track on stage in Boston.

Last night in New York, it was Selena's turn ... doing her own rendition at a show for UNICEF in NYC.

So we gotta ask ...

Think Jennifer Lopez was thinkin' "Gee, I'm a Dumbass" when she watched Ben Affleck -- the guy she DUMPED back in 2004 -- clean up at the Golden Globes this weekend?

We do.

Oh, the stories Jason Trawick could tell, but never will ... because TMZ has learned he signed a confidentiality agreement with Britney Spears, preventing him from ever blabbing about their relationship.

According to our sources, Trawick was approached by Britney's team when Jason signed on to be a co-conservator, which came five months after they were engaged. We're told Trawick willingly signed the confidentiality agreement, which prevents him from talking to the press about his relationship with Britney.

However, a source close to the couple tells TMZ the two are still very close and he respects her too much to ever talk publicly about their time together ... confidentiality agreement or not.

Britney Spears and Jason Trawick broke up primarily because she wanted to have more kids and he didn't ... TMZ has learned.

Sources directly connected to the couple tell us ... Britney, who is 31, loves her boys and desperately wants more kids. Jason, who is 41, is "in another place" and does not want to start a family -- although he loves Sean Preston and Jayden James. We're told the former couple argued frequently about family and this ultimately proved their undoing.

Our sources say ... there's something else -- dealing with the Britney empire wore at Jason and "took away his individuality." Jason wanted to maintain his identity and one of the ways was to expand his business by taking on more clients (he's an agent) and making more money -- this didn't sit well with Britney.

As for settling up -- we're told it's simple. There are no outstanding financial issues. Sources say the house Britney just bought -- $8.5 mil in Thousand Oaks, CA -- was purchased solely with her money and Jason has no claim to it.

The newly-unencumbered Jason Trawick is once again the proud owner of a $90,000 engagement ring ... because we've learned Britney Spears has already given it back.

Sources connected with the couple tell TMZ ... Jason did not ask Brit to return the 3.5-carat, Neil Lane ring ... she returned it on her own.

By the way ... there are reports that Britney bought the ring herself. Not true.

FUN FACT: In California, the ring -- which in legalese is a "gift in contemplation of marriage" -- must be returned if the wedding is cancelled, UNLESS the dude is the one who called the whole thing off. If it's a mutual break-up, or if the woman is the one who pulls the plug, the ring goes back to the guy.

The question -- If Jason gets engaged again, is it bad luck to give that ring to his fiancée?

Britney Spears has had a big week. We broke the stories that she's split with fiancé Jason Trawick and is negotiating a huge deal to move to Vegas, where she would regularly perform. So we gotta ask ...

4:17PM PST: Jason Trawick has just been removed as Britney's co-conservator ... TMZ has learned. Jamie Spears is once again her sole conservator.

Britney Spears and Jason Trawick have broken up ... TMZ has learned.

The couple got engaged back in 2011. Trawick started out as Britney's agent, the duo started dating and he eventually became her co-conservator along with her dad, Jamie Spears.

Multiple sources connected to the couple tell TMZ ... Jason didn't want to make the announcement until he was taken off the conservatorship. Interestingly, lawyers for the conservatorship are in court right now, along with Britney's dad, Jamie Spears, so it's possible Jason will be removed today.

Sources say it was a "friendly breakup" and Britney and Jason will remain friends. As for why they split, we're told they just "grew apart."

The timing's pretty interesting considering Brit recently changed agencies, heading to CAA ... an indication Trawick was no longer involved in managing her career.

Britney told People.com ... "Jason and I have decided to call off our engagement. I'll always adore him and we will remain great friends."

Trawick also issued a statement saying, "As this chapter ends for us a new one begins. I love and cherish her and her boys and we will be close forever."

It's barely been a month since she broke up with her NFL player ex, but Hayden Panettiere's already got her hands on another man's kielbasa ... ex-BF Wladimir Klitschko ... at least that's the way it seemed at the airport today ... with her adorably girly giggle fit.

Fact: the 6'6" Ukrainian World Boxing Organization champ dropped 5'2" Hayden off at the airport today in Florida, where he lives.

Fact: When Hayden landed in L.A. she giggled like a schoolgirl when we asked her about Wlad -- insisting she and Wlad are "just good buddies."

Fact: THEY'RE OBVIOUSLY BONING AGAIN ... probably.

You'll recall, Hayden and her ex-BF Scotty McKnight -- who played for the Jets before he was cut last summer -- called it quits back in December.

If there's one thing Harry Styles didn't get enough of while dating Taylor Swift ... it's clam -- because that's pretty much the first thing he ate following their breakup ... and TMZ has the pic.

The "One Direction" singer -- who just ended his record 2-month relationship with T. Swizzle -- was in Queens Sunday night, when he got a hankering for some Italian ... and swung by the famous Don Peppe's with a pal.

We're told Harry appeared extremely chill throughout his meal -- happily noshing on veal parmigiana, shrimp luciano over linguini, and his main course ... a steaming pile of clams.

Melissa Etheridge just scored a legal victory against her former domestic partner Tammy Lynn Michaels, who was trying to get their settlement tossed out the window.

The judge in the legal war has ruled the settlement is valid and binding.

TMZ broke the story ... under the terms of the settlement ... Melissa must pay Tammy $13,000 a month in spousal support and $10,000 a month in child support. They have agreed to joint custody.

Melissa gets to keep some property in Springdale, Arizona, Hidden Hills, California, and somewhere in Arkansas.

As for Tammy, she gets 50% of the royalties from the album, The Awakening. Tammy also gets 50% from the songs, A Simple Love, All There Is, All We Can Really Do, An Unexpected Rain, California, God is in the People, Heroes and Friends, Imagine That, I've Loved You Before, Map of the Stars, Message to Myself, Open Your Minds, The Kingdom of Heaven, The Universe Listened, Threesome, and What Happens Tomorrow.

Selena Gomez had nothing to say at LAX about her breakup with Justin Bieber or allegations that the Biebs had been smoking pot.

TMZ broke the story ... Selena and Justin broke up in Mexico on December 30th after a blowout argument. She flew back to L.A. that day and Justin returned on New Year's Eve. As for the nature of the argument, a source tells us, "It's just high school stuff."

The photogs were trying to grill Gomez -- who dressed like a chic Unabomber -- about Justin's alleged marijuana use. A close friend of Chris Guerra -- the photog who was killed on New Year's Day -- told TMZ Guerra had told him he saw J.B. driving his Ferrari earlier in the day, smoking pot from a pipe. Sources connected with Bieber insist it's not the case.

Olympic legend Michael Phelps has broken up with girlfriend Megan Rossee ... TMZ has learned.

Look at the photo above, then read that sentence again.

According to our sources, Phelps felt the relationship wasn't going anywhere, so he decided to end it so he could pursue other options.

And apparently in the world of Michael Phelps, those options are somehow better than this.

If you're on Mel Gibson's Christmas list this year, here's one thing you DEFINITELY won't be getting ... Oksana Grigorieva's new album.

Mel was in a rare, jovial mood when we spotted him chatting with fans outside a screening of "Apocalypto" in Hollywood last night. When our photog shouted to Mel ... "You gonna pick up Oksana's album?" ... he gave a HUGE chuckle before shaking his head and walking away.