Kourtney Kardashian's letting it all hang out!

As she took son Mason to his music class, the mother-of-three exposed her Tommy Hilfiger undies above the waistline of her grey sweatpants. She took it a step further with a white cropped tee -- to make SURE we'd see her panties -- and topped it off with an Adidas sweatshirt and her usual Gucci sneakers. Talk about a label whore!

She looks awesome, though, and let's be honest, she's gotta keep it sexy if she wants to keep the attention of her younger supposed-boyfriend, 23-year-old French model, Younes Bendjima. The two were spotted out together Sunday night at the SLS hotel in Beverly Hills. Guess Bieber's over and she's on to her next boy toy!

Forget fur, we prefer Bieber in the flesh! Naked flesh, that is -- after Justin was slammed for wearing a REAL fur coat Monday night, animal-rights activists jumped on the pop star and trolled him on social media for wearing the nasty mink coat.

But JB doesn't seem to mind, it was business as usual as he hit the hiking trail for some mountain jogging on Tuesday. It's his new routine and we must say, it's paying off!

So ummm ... Rob Kardashian and Blac Chyna are back together! WHAT?! Our heads are spinning!

The on-again/off-again/on-again couple is apparently back after a "heat of the moment" break up, according to Us Weekly.

Umm "heat of the moment" split?! Rob possibly hacked her Instagram, she moved out, took their child and he posted sad sack videos from their empty home! That sounds pretty final -- but we do know when you're part of this dynamic duo that making up and breaking up publicly is just part of your weekend activities ...

A source close to Chyna said, "He apologized to her on the phone. She was just sick of him and his behavior. She had it with his insecurities and jealousy."

After the weekend's dramarama, Rob took to social media yesterday and backpedalled. He and vowed to change his ways for his fiancée and their little girl.

"This weekend I was in an emotional bad place and did some things that embarrassed myself and my family. I apologize and I'm seeking help to deal with my flaws/issues. Please pray for me and I'm sorry @blacchyna. You are a great mother to our child and I love you," he wrote on Instagram.

In another post, he declared, "I am going to get better for you Dream. You are my life and gave me a new start on being a better me. Love you."

Seems like a frothy emotional appeal was all Chyna needed to take back her unstable beau. Umm maybe he should get some actual professional help to deal with his issues? Just an idea!

Hot potential couple alert!

Jennifer Lopez and Drake have been "spending a lot of time together" and "it's only a matter of time" before their friendship turns romantic, TMZ reports. The pair hung out Monday night in LA at Delilah restaurant, and the rapper has been spotted at her Las Vegas concert twice this month.

Jenny from the Block and Drizzy have been collaborating on new music together, but it sounds like a collab in the bedroom is in the near future!

It's perfect timing, as the bootylicious beauty split with boyfriend Casper Smart this past August and the "Hotline Bling" crooner is currently off with Rihanna.

They seem like the perfect match!

'Tis the season to let it all hang out on Instagram, apparently.

Kylie Jenner shared these sexy Polaroid pix of herself in a see-thru mesh top on social media yesterday, but she kept it classy by covering her nipples with tiger emojis, presumably a tribute to her rapper beau Tyga. Aww! The plastic surgery princess has denied having breast implants over and over again, but her excuses just don't make sense after seeing these snapshots.

The 19-year-old LipKit mogul has claimed that her sudden ample cleavage is the result of wonder working undergarments, but she's not wearing a bra in these photos, so....

"I don’t share this with a lot of people, but everyone thinks I’ve gotten breast augmentation recently, but I haven’t. I just use the Bombshell by Victoria’s Secret. It’s life-changing. I’ve gotten all my sisters on it and all my friends. Clearly, it’s like 10 times bigger — no contouring, no nothing. This is all padding. I think it makes your breast look great and girlie. This is it. No breast implants. No surgery. Nothing. It’s amazing. So if you guys want this look, here’s my secret," she declared in a video shared on kyliejenner.com.

Just fess up, Kyls!

After a trip to with Eddie Cibrian and his sons, LeAnn Rimes and her brood of boys is back in Los Angeles -- and they're looking good!

The country crooner had two shows at the Orleans Casino in Las Vegas and brought the fam out for it, but we have a feeling the foursome came back to Lalaland so that the boys could be with their mom Brandi Glanville in time for the holidays.

The 34-year-old looked cool in a leather jacket, plaid shirt, black jeans and Golden Goose sneaks, as she held hands with her hubby, who was looking as hunky as usual. Eddie looked super sexy in a white shirt and black pants. He may have tried to go incognito with his hat and sunglasses but we spotted that sexy mug of his!

Mason and Jake looked at ease with their step mother and their dad after their quick trip to Vegas. We bet their mom is glad to have them back home though -- she's one jealous mama!

Sadly for Brandi, it looks like this couple, who have been married for five years, is still going strong!

Baby it's cold outside. 💋

A photo posted by Lisa Rinna (@lisarinna) on Dec 17, 2016 at 12:03pm PST

If our mother was doing this we'd be mortified, but we have to admit she looks damn good!

Lisa Rinna is braving the cold winter temperatures by, well... taking off her clothes! The Real Housewives of Beverly Hills star stripped down to her bra and undies to show off her insanely sculpted physique on Instagram the other day, and we seriously can't believe she's 53-years-old! Husband Harry Hamlin is one lucky dude.

The reality star has been the subject of plastic surgery rumors for years, but she claims other than her lips and a boob job, she's au naturel. "No I don't (have new boobs), but I have boob pads in. It's all an illusion people, I can do many things with this body," she confessed during a recent appearance on Watch What Happens Live!.

Her co-stars have accused her of never eating and being too skinny, but we think she looks fit and toned based on this picture!

Good morning! May you all have a blessed day 😊

A photo posted by Britney Spears (@britneyspears) on Dec 19, 2016 at 9:19am PST

Britney Spears made sure all eyes were on her hooha when she posted a sexy yoga pose on her Instagram.

The popstar flashed her flesh for her 14.4 million followers on Instagram when she posted a photo from the gym of herself, posing upside down in a handstand, wearing work out attire, which consisted of a sports bra and barely there shorts.

We were a little shocked to see so much of Brit Brit's undercarriage in the snap -- but clearly her intention was to expose that part of her. She's been no stranger to sharing photos of her rockin' bod -- but this seems like a little much. At least she looks good!

The "Toxic" singer captioned the photo: "Good morning. May you all have a blessed day." We will after that eyeful!

Meanwhile, the superstar was spotted on a cozy dinner date with her new boy toy Sam Asghari earlier this week -- looks like working out does a body, and so does a good love life!