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How's this for a Grecian Formula ... Tiffany Trump and Lindsay Lohan in Mykonos.

Tiff and LiLo partied Friday night at a fundraiser to help victims of the Greek wildfires.

Turns out Donald Trump's youngest daughter and Lindsay are old buds and have actually hung out a lot over the years.

Lindsay opened a club called Beach House Mykonos earlier this year. As for Tiffany ... she's spending the summer overseas after finishing her second year at Georgetown Law School.

Kendrick Lamar was really channeling his "Good kid, m.A.A.d city" vibe in Australia this week ... especially standing next to his towering bodyguard, who mades him look like a tot.

The Compton rapper -- who stands 5'5" -- was going for a stroll Tuesday morning in Sydney with his hired muscle close by. He's got a show there later Tuesday, and it seems like he didn't wanna deal with any surprises ahead of his performance ... 'cause no one would dare come within 10 feet of him with this monster of a dude serving as a shield.

Can't blame him for wanting the extra security -- Kendrick's cherished goods these days now that he's got a Pulitzer under his belt ... plus all those other accolades.

He's also arguably the best MC in the game right now ... so yeah, protect your neck, bro.

Christian Bale's ditched any vestige of Dick Cheney from his life, and by that we mean roughly 100 lbs ... in just a matter of months.

CB and his fam -- like most of the world, it seems -- are on vacay in Italy and, during a Friday morning stroll, he looked incredibly thin. Incredible because 7 months ago he was way more bulked up for his role as the ex-veep.

This is kinda his thing -- Christian typically yo-yos like nobody's business for his roles. He got up to about 228 pounds for "American Hustle" ... and everyone remembers how scarily thin he was for "The Machinist." He shed almost 70 lbs for that one!

Rest easy Knicks fans ... Kristaps Porzingis' torn ACL is healing just fine, thanks to some expert medical attention from a smoke show blonde in a lab coat -- and by lab coat, we mean bikini.

The NBA star is yacht partying this weekend with a mystery chick off the coast of Ibiza. Porzingy's ACL injury could reportedly keep him off the court for the first 2 months of next season -- but maybe these pics are a sign he could be back sooner.

After all, Dr. Two Piece is giving him the thumbs up. How bad could it be? Not to mention, he's even feeling good enough for a leap into the ocean!

For reals though ... KP has been rehabbing his knee in Spain with Real Madrid's actual medical staff.

Heidi Klum, her kids and her guy all hit Disneyland, and it's a toss up as to who had more fun -- although we're giving bf Tom Kaulitz the early lead.

The German super couple -- Tom's the guitarist for Tokio Hotel -- was all over each other Saturday in Anaheim. She even got Tom to slip on a pair of polka-dotted Minnie Mouse ears while they strolled around. The things we do for love, right?

Heidi's kids already look totally comfortable with Mom's new dude -- they were all smiling with him on Splash Mountain and several other rides. One small crisis, though ...

Looks like Heidi got a little something on her lips at one point. Luckily, Tommy-on-the-spot was there to handle the situation.

Chris Pine is back from the dead, or part of a ridiculous dream sequence, in the next 'Wonder Woman' flick ... based on pics from the set. Ummm ... spoiler alert?

Chris was spotted Wednesday in Virginia with costar Gal Gadot. We knew Chris was returning to his role of Steve Trevor, but since he died in the first one ... we don't how HOW he's coming back. There's a big clue, we think, in this pic. Two words: FANNY. PACK.

The sequel is set in 1984, so the stylish wardrobe piece makes sense.

Since the sequel fast forwards about 66 years, we're guessing science or time travel has to be involved for Steve to still be alive -- but it can't be a dream sequence. NO ONE would include a fanny pack in a dream!

1:58 PM PT -- Turns out Blake's mystery blonde is none other than Francesca Aiello -- the owner of Frankies Bikinis. Good choice.

Even in the off-season, Blake Griffin's rebound skills are on point -- just ask the blonde chick he was sucking face with in his Land Rover.

The NBA star and his mystery woman are definitely living on the edge. Saturday's date night included riding around on Bird scooters in L.A. ... which, considering Blake's history of injuries, might not have been the smartest option.

A better, safer idea? Sitting in Blake's whip and making out ... which they also did.

No clue yet who the lucky lady is, but she's the first woman he's been spotted with since he and Kendall Jenner broke things off.

Kylie Jenner is back in action, hitting up The Nice Guy in WeHo and looking like the whole pregnancy thing was just a dream.

Kylie showed up for a birthday party in a 2-piece satin suit ... pal Harry Hudson, a musician, turned 23. She arrived with her BFF Jordyn Woods.

Helen Mirren went tumbling down after leaving an interview at the Cannes Film Festival ... but fortunately the dame is a-okay.

The 72-year-old actress went down Saturday morning after being interviewed on Martinez Beach during the 71st annual film fest ... but was quickly helped to her feet and handed her shoe, and appeared to be relatively unharmed.

She told reporters afterward she sprained her wrist but is doing fine, and the good news is ... she still looked as elegant and fancy as ever in her royal purple coat.

The isn't the first fall for Helen at Cannes -- she tripped going up the stairs at a movie premiere in 2016 -- but hopefully it's her last.

Kanye West is looking quite comfortable these days ... and we're not just talking about his outfit.

The rapper was spotted leaving Nobu in Malibu with some friends Friday night in a t-shirt, sweatpants and a light jacket ... and couldn't look happier about the way things are going lately.

Kanye's been in a great mood for a few days. We saw him smiling leaving his office after giving Charlamagne Tha God a preview of his new album, before announcing he's actually releasing TWO albums in June ... one with Kid Cudi.

Then of course, there was his social media PDA with Kim Kardashian at a party for Kourtney's 39th bday ... something rarely seen from the couple.

Abby Lee Miller is halfway back to normal on the heels of her prison release -- 'cause she just got her nails done on the outside for the first time in almost a year.

Abby was spotted Thursday hitting up Pampered Hands -- a nail salon in WeHo -- just a couple days after being transferred to an L.A.-area halfway house to finish her sentence.

Abby Lee Miller is stretching her legs in her new digs on day 1 of her post-prison life.

We got these pics of Abby walking around a common area Wednesday morning at the Los Angeles-area halfway house where she's now a resident. The Residential Reentry Center will prep the "Dance Moms" star for a return to civilian life.

As TMZ first reported, Abby checked into the facility on Tuesday ... and will be getting counseling ahead of her May 25 release date. She has been serving her time for tax fraud since last July in the Victorville, CA prison.

Justin Bieber is showing compassion for folks who are down on their luck ... and this could have religious overtones.

Bieber was spotted Wednesday plopping himself down onto an L.A. sidewalk after a SoulCycle sesh to chat up a homeless man and woman who were sleeping on the pavement.

We're not sure what he was talking to them about, but he was clearly interested in what they had to say ... and was in no rush to wrap up the convo.

Mel B's so obsessed with being in the Spice Girls, you might say it's scary ... and if you didn't say it, her wardrobe spells it out.

Mel was out in WeHo Tuesday wearing a pink coat emblazoned with her Spice name ... Scary. There were a few clues for anyone walking behind Mel, too -- the back of the jacket's bedazzled with the famous line "ZIGA ZIG HA" from their huge hit, "Wannabe."

Mel was hanging with her hairdresser pal, Gary Madatyan, near BOA Steakhouse when she was photographed in the throwback uni, which is about to be all the rage again.

Rick Ross is looking thinner, but also much stronger after his intensive care health crisis -- and he's even taking time to deal with family matters.

Rick was out with his mom, Tommie Roberts, earlier this week in Fort Lauderdale. The Boss was feeling good enough to floss for photogs as he left an attorney's office. We're told he's in the process of hammering out a child support agreement with his baby mama, Tia Kemp.

Tia and Rick have been going HAM on each other on social media in recent months ... with her accusing him of neglecting their son and calling his family ugly. For his part, Rick's claimed Tia's just salty over the fact he banged her sister first.

Eric Dane might be having a major blonde moment in the wake of him and his wife filing for divorce -- that, or he's just really feeling himself ... we're not sure.

The "Grey's Anatomy" star was spotted rockin' a brand new 'do Tuesday in WeHo -- combed up and to the side ... and a bit more bleached than what we're used to seeing. He was also wearing a pair of cool sunglasses, with a very cool coat. Ladykiller, are we right?

We broke the story ... Eric's wife of 14 years, Rebecca Gayheart, filed for divorce last month, and Eric responded with a very similar filing. He agreed to her spousal support request, as well as her bid to gain joint legal and physical custody of their 2 kids.

Now that most of the dirty work appears to be settled ... time to get back to channeling McSteamy.