Hook Ups

Justin Bieber can toot it, boot it, then toot it again -- TMZ has learned, he's back getting it on with a Vegas Hooters waitress he hooked up with last summer ... after dumping her for several other girls in between.

22-year-old Jordan Ozuna posted this photo on Instagram February 16th from inside the spaceship mansion Bieber's currently renting in Atlanta. We won't say how we know, but we know.

Bieber and Jordan first hooked up in Vegas last June -- Jordan worked as a Hooters waitress at the time. They were photographed going indoor skydiving together ... and even kissing ... but we haven't seen much of her since ... until now.

And if the bed photo isn't convincing, here's a picture of Ozuna playing around at a Dave & Buster's in Atlanta the day before Valentine's Day -- the same day Bieber was also photographed at the same location.

It's unclear what happened to Bieber's Miami chick Chantel Jeffries, but she's been replaced ... at least for now.

Model Cara Delevingne was the big winner ... when Michelle Rodriguez emerged nearly naked from their limo in London. Well, honestly -- we're ALL winners on this one.

Just ask M-Rod and CD's limo driver.

No one had a better ride than Michelle Rodriguez last night -- just ask her pants ... which disappeared off her body while she was in the backseat of a limo with her new GF Cara Delevingne!

Here's what we know.

Fact: Michelle was wearing white pants when she and Cara hopped a ride back to their London hotel.

Fact: Michelle stepped out of the car cloaked in her bodyguard's jacket ... WITHOUT pants.

FUN FACT: CD stepped out of the car right after Michelle ... holding white pants.

Fact: These pictures tell an AWESOME story, and this is our new favorite celeb couple.

Jessica Simpson's dad Joe has found a young man to spend his time with ... and photograph ... shirtless ... in Miami.

The pics were taken Saturday in South Beach, showing 55-year-old Joe getting his tan on with a much younger man ... and then taking shirtless photos of the guy, sprawled out on the sand.

Joe divorced ex-wife Tina in April after 35 years of marriage.

Whatever ... looks like he's having fun.

Michelle Rodriguez and supermodel Cara Delevingne are acknowledging the obvious -- they're the hottest lesbian couple in the universe -- and to prove it they ate out last night.

Michelle and Cara were photographed leaving a London restaurant together, looking very coupley.

And to make it official -- before their date, Michelle told The Mirror they're an item, saying, "It's going really well. She's so cool. When we started hanging out, I just thought she was awesome, and we have the best time together."

35-year-old Michelle and 21-year-old Cara have been all over each other for 6 weeks now -- starting last month with a drunken makeout session courtside at a Knicks game -- so nothing fishy about this hookup.

Julianne caught some So. Cal. rays with Washington Capitals center Brooks Laich. With photogs in plain sight they clearly wanted to make a statement as they walked with her teeny tiny dogs.

It's not like Ryan Seacrest will be heartbroken. He's moved on with another hot chick, who apparently is cool that he sees other people as well. In other words, don't feel sorry for him.

Sorry, Adam Devine ... but you probably won't get to bang Rebel Wilson in "Pitch Perfect 2" -- the actress says her love interest in the sequel may actually be Drake.

Rebel dropped the casting spoiler while leaving a West Hollywood salon after our photog asked about Drake's Rolling Stone drama this week.

The 28-year-old actress was tight lipped on more "P.P." details ... but did say what she would have done with the popular magazine in Drake's shoes.

Christina Aguilera just gave her production assistant a huge promotion -- fiance.

Matt Rutler met Christina on the set of the 2010 film "Burlesque," where he worked as a P.A.

She was divorced and he was there ... and they hooked up. They're living together in her new, $10 million mansion.

Lots of people thought it wouldn't last, but now -- 3 years later -- she just posted a Facebook pic of an ENORMOUS ring with the caption, "He asked and I said ......"

As for who plunked down money for the ring ......

4:25 PM PT -- the baby's name is ERIC ... after Simon's father.

Simon Cowell is officially a father ... his pregnant GF Lauren Silverman has finally popped in NYC.

36-year-old Silverman just gave birth to a healthy baby boy at Lenox Hill Hospital -- after Simon flew across the ocean from London to be by her side for the delivery. As we reported, Lauren went into labor early this morning and Simon hopped on a plane as soon as he heard.

We're told the baby was born at 5:45 PM EST at 6 pounds, 7 ounces.

The boy is 54-year-old Simon's first child and Lauren's second -- she also has an 8-year-old son with her ex Andrew Silverman.

So far, no word on the baby's name.

Erin Andrews took a break from being yelled at by NFL superstars to remind you ... she's actually in pretty good shape.

Andrews and L.A. Kings star Jarret Stoll are on a little couples retreat at the moment -- and decided to spice things up with a stand-up paddle board session.

Not as exciting as getting screamed at by Richard Sherman ... but still, impressive.

Love sucks -- at least for supermodel Alessandra Ambrosio, who stepped out in L.A. Thursday with what appears to be a GIANT HICKEY on her neck.

Alessandra was with her millionaire businessman fiance Jamie Mazur at the time, so it makes sense. Especially since today is Valentine's Day (sorry for the reminder).

Word of advice to NBA players ... wrap it up TIGHT for All-Star weekend -- 'cause the gold-diggers are heading to New Orleans IN DROVES ... so says Mannie Fresh, one of the most powerful guys in rap.

Mannie -- who'll be judging a rap contest in the Big Easy this weekend -- tells TMZ Sports, "It's going down. There's gonna be a lot of chicks lookin' to get theirs ... ogling salaries."

He's right ... and one of the spots the wallet-chasers are sure to hit up is The Maison -- where Manny and Portland Trailblazers stud Damian Lillard are judging the "4-Bar Friday" freestyle rap contest.

FYI -- Lillard created the "4-Bar Friday" challenge on social media ... where people post videos of themselves trying to spit 4 lines of a rap.

Tons of NBA stars have posted their best "4-Bar Friday" attempts online in the past ... including LeBron James, Paul George, Harrison Barnes, Draymond Green, and even Damian himself.

No word if all those superstars are hittin' up the party -- but Manny says one thing's for sure ... "There will be a lot of people with a lot of money."

Amy Smart's fired up for Valentine's Day ... of course, she's married ... but if you're single and lonely -- well, who really cares?

Kidding! The real cure for your V.D. blues is -- self pleasure delivery! We should explain ...

Team USA is obsessed with Tinder -- the app that helps you find people to bang -- but now, the company's co-founder is begging the athletes to KEEP IT IN THEIR PANTS until after their events.

Earlier this week, gold-medal winning snowboarder Jamie Anderson told US Weekly, "Tinder in the Olympic Village is next level ... There are some cuties on there.”

She added, "There was a point where I had to be like OK, this is way too distracting. I deleted my account to focus on the Olympics.”

We spoke with Tinder co-founder Justin Mateen, who has a surprising message for the Olympians: Focus on kicking ass ... not tapping it.

"Tinder is a great way to meet new people when you're traveling and want to get the most out of your experience in a new city, but for now, focus on giving it your all while competing."

"Tinder will always be here when you're done."

Of course, Olympic Village has a reputation for being a "debaucherous" sex party ... and the app only makes it that much easier to find an athlete to bone.

Derek Jeter has had a legendary career ... and not just on the field.

During his 19-year run with the Yankees, #2 took down more 10s than anyone else in pro sports ... chicks like Jessica Alba, Adriana Lima, Minka Kelly ... and the list goes on ... and on ... and on.

So even though he's retiring from baseball, it's clear Jeter will keep knockin' it out the park for years to come.

Things haven't even begun to heat up in Sochi yet ... at least when it comes to the storied SEX PARTIES in Olympic Village ... so says someone who would know, Team USA snowboarder Sage Kotsenburg.

Kotsenburg -- who just won THE GOLD in Snowboard Slopestyle -- is back in the U.S. and earlier today, we HAD to ask about the international bangfest that athletes have been raving about for years!

OLYMPIC SEX NOTE -- tons of athletes have talked about the rampant sex in Olympic Village, including UFC bad ass Ronda Rousey, who told us the scene is pure "debauchery."

But Sage tells us ... none of the athletes are playin' hide the pirozhki just yet ... explaining, "Toward the end of the week, people get pretty rowdy I heard."

On a related note, Sage says he might head back to Russia before the games are over.