Demi Lovato Quits Tour Enters Treatment Center

Disney star Demi Lovato has bailed on an international concert tour with the Jonas Brothers -- and has checked into a treatment center to seek help for "emotional and physical issues" ... TMZ has confirmed through the singer's rep.

In a statement to TMZ, the 18-year-old singer's rep says, "Demi Lovato left her tour early this weekend in order to seek medical treatment for emotional and physical issues she has dealt with for some time."

We're told Demi is not seeking treatment for drug use.

The statement continues, "Demi has decided to take personal responsibility for her actions and seek help. She is doing just that."

The rep concludes, "[Demi] regrets not being able to finish her tour, but is looking forward to getting back to work in the near future."

Sources close to Lovato tell us the singer was in a physical altercation with a female member of her tour recently ... which was a "catalyst" in her decision to seek professional help.

Nick Jonas & Rick Warren: Love Thy Fellow Man

Evangelical Christian boy bander Nick Jonas hugged it out with controversial marriage equality opponent and Saddleback Church pastor Rick Warren at Anaheim Stadium on Easter Sunday.

Jesus loves your skinny jeans.

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Joe Jonas -- Head Over Heels, But Not for Demi

Joe Jonas got his buff on by practicing his acrobatic skills on the beach in Santa Monica this weekend.

Purity rings aren't the only ones the 20-year-old can rock.

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Demi & Joe Jonas: A Match Made in Disneyland

After finally confirming they are a couple, Demi Lovato and Joe Jonas stepped out in public yesterday to do a little platonic shopping in Los Feliz.

Rumors that they're the same size are not true.

Selena G to Boyfriend I Got You in My Pocket

Selena Gomez went shopping in Texas for her "boyfriend" on Tuesday -- and she got the perfect thing for him to play with in his pocket: A watch.

TMZ has learned the teen Disney idol was on the hunt for the perfect timepiece for a special friend -- if you believe the rumors, that friend is Nick Jonas. She picked it up at a jewelry store in the Northpark Mall in Dallas.

We're told she got the watch engraved with the phrase "Check the time ... I love you right now" -- and then personalized the box with a line from a Roy Croft love poem: "I love you, not only for what you are, but for what I am with you."

Good deal ... considering the total bill was only $148.31.

Selena & Nick Reunite on a Platonic Bench

Former non-lovers Selena Gomez and Nick Jonas got cozy on a park bench by Lake Michigan in Chicago this weekend.

So much for Nick's solo career.

Kevin Jonas -- Post-Coitus

Happy honeymoon pal.

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One of the Jonas Bros. Got Married

It was Kevin.

Congrats.

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Jonas vs. Jonas Who'd You Rather?

Evangelical Christian dandy boy band biological brothers Kevin Jonas, 22, and Joe Jonas, 20, stayed pure at the same event in L.A. on Wednesday.

Question is ...

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Stage Crasher Runs Amok at Jonas Bro Show

A rabid male fan crashed the stage at a Jonas Brothers concert the other night in Madrid -- but unlike Britney, who infamously screamed when the same thing happened to her, these guys just kept on playing.

The good stuff -- which includes the dude running in circles from security and ripping his shirt off -- starts at the 1:13 mark.

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Joe Jonas Gets Tanked Again

Sporting a new shorter 'do, middle Jonas Brother Joe showed off his ripped virginal arms and his hairy evangelical legs in West Hollywood this weekend.

He may only be 20, but JoJo can still get tanked.

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Joe Jonas Gets Tanked

Showing off his pure evangelical Christian dandy boy band muscles, Joe Jonas hit a Jewish Community Center gym in Toronto on Thursday.

Mazel tov!

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Jonas Bros Reach Their Teppan Point With Girls

Evangelical Christian dandy boy banders Joe and Kevin Jonas set their purity rings to hungry last night ... and double-dated at a Japanese restaurant with Demi Lovato and Kevin's fiancee, Danielle, in Toronto.

The only thing they had for dessert ... was dessert.

Hanson to Jonas Bros: You 'Cat Burgled' Our Act!

Turns out the whole "Jonas Brothers" thing is all Hanson's fault -- 'cause when we asked Zack if the new batch of cheesy jingle writing, over-priced hair-cut sporting, band of brothers stole their act ... dude didn't exactly deny it!

One thing they'll never steal -- mmmBop ... which Zack says he's performed more than 1400 times!!!!

Joe Jonas 'Suite' Rebound?

Looks like Joe Jonas may be fishing around the Mouse House for a Camilla Belle replacement -- because last night he was caught creepin' with "Suite Life of Zack & Cody" star Brenda Song.

They may not have walked out of Katsuya together -- but Brenda not-so-slyly hopped into Joe's car down the block.

That Jonas Brother For President

Nick Jonas was walking around Washington D.C. yesterday like he was gunning for Obama's job. The only problem: Fans on the street thought he was one of his identically floppy-haired, purity ring-wearing brothers.

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