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DON'T SLEEP ON THIS -- This sexy star recently blessed her 87 million Instagram followers with a little tease in bed!

Here's another clue for ya ... she walked the steps earlier this week and owned her Met Gala look.

Simon Cowell's known for being a bit nasty to contestants on the TV shows he judges ... but, a couple wanted him to get nasty in the bedroom too -- asking him to judge them while they did the deed.

The former "American Idol" judge sat for an interview on the "How to Fail with Elizabeth Day" podcast ... and, Day asked him what people say to him most when they stop him in the street.

Cowell says fans -- particularly Americans -- used to ask him all the time to be rude to them ... a request he usually turned down.

It's guessing time, y'all! Can you guess which 49-year-old British pop star put her hot bod on display in this eye-popping sexy selfie?! Here are a few clues to get ya started ...

She and her girl group stormed onto the music scene in the mid-'90s, and her friend Victoria Beckham designed her wedding dress. If you're still unsure, she'll "tell you what you want, what you really, really want!"

Brad Arnold -- lead singer of 3 Doors Down -- has cancer ... and, he revealed the news in an emotional social media post.

The musician told the band's many fans that he was diagnosed with clear cell renal carcinoma, a form of kidney cancer. Arnold then says the cancer metastasized to his lungs ... a stage 4 diagnosis.

Brad says he's trying to stay positive ... giving all the glory to God -- adding his faith means he's not scared at all.

It’s been 20 years and Shakira’s hips still don’t lie -- and she just reminded everyone with a performance that slapped, shook, and served.

Shakira hit the stage looking like she hadn’t aged a day in 2 decades -- diving into the sand in a fiery red dress, showing off her signature moves before bringing out her collab king, Wyclef Jean, on "The Tonight Show Starring Jimmy Fallon."

The Colombian queen went all out for the anniversary special -- pure nostalgia, hips in full swing, and a crowd-pleasing jam backed by live musicians.

Colombian singer J Balvin is celebrating a big one today ... It's his 40th birthday, and we can only do him right by flashin' you his fire photos ... Sit back and take in the show, 'cuz this hottie is strippin' down!

With his 2014 "6 AM" breakthrough, Balvin has continued to deliver stellar music, but most importantly: sexy snaps ... The Medellin native loves a short swim trunk, as do we 😜!

He's also been on his fitness game ... and compared to the hot shots in our gallery, this shredded back photo is quite tame!

BLACKPINK’s Lisa found herself in hot water for rocking Rosa Parks’ face on her underwear at the Met Gala -- but plot twist: the vision actually came from two Black creatives, including none other than Pharrell Williams.

Check out this clip of Pharrell breaking it all the way down -- walking folks through how Lisa’s Met Gala look nailed the "Superfine: Tailoring Black Style" theme -- which was all about paying tribute to dandyism in Black culture.

According to Pharrell -- the Met's co-chair and Louis Vuitton's creative director -- Lisa wasn’t just dressed up, she was wearing a piece of art that was all about honoring Black culture, especially considering how much the world borrows from it.

Rihanna says when the sun shines, we shine together ... but, when it rains, it's better to stay far apart -- 'cause the singer-songwriter took an umbrella to the face in stormy weather!

The singer-songwriter was out in New York City before the Met Gala on Monday ... and, while marching into the Carlyle Hotel in Manhattan, she came up behind a man holding his own umbrella.

Check out the clip ... the man turns and his umbrella comes under RiRi's own -- which she's holding herself -- and appears to smack her right in the cheek.

Celebs showed up for the fashion, but it wasn’t just about the style -- there were some epic big-name performances in the mix, too.

Usher and Stevie Wonder headlined at The Met Monday night, with Usher kicking things off, getting the crowd hyped with a medley of bangers -- including "U Don’t Have to Call," "OMG" ... and of course, "Yeah!"

Then Stevie Wonder took the stage with a nine-piece band and served a true musical feast -- belting out classics like "Higher Ground," "Isn’t She Lovely," and crowd-favorite "Signed, Sealed, Delivered."

Rihanna and A$AP Rocky were the life of their MET Gala after-party Monday night with a bevy of other A-listers showing up to have fun and to see the main attraction -- RiRi's new bun in the oven!

That's right! Pregnant RiRi and her baby daddy Rocky were the toast of the town -- or at least Jean's Restaurant in Manhattan, where their festivity kicked off. Rocky and Rihanna rolled inside, rockin' their fanciest duds.

Check out photos, obtained by TMZ ... Rocky sported a snazzy black suit and overcoat, and RiRi wore a leather dress with a black top that exposed her growing baby bump.

Aubrey O'Day is in Japan, but it seems she's got a courthouse in Manhattan on the brain ... because she appears to be throwing some major shade at her old boss at the start of his criminal trial.

The former Danity Kane singer posted a bunch of photos from her trip to Japan on Instagram, but the most interesting thing was the caption -- "Your Honor…"

Aubrey seems to be referencing Diddy's sex trafficking trial in New York City.

Lance Bass went all out for his 46th birthday ... spending the weekend partying in Las Vegas, and getting pulled onstage by Nelly.

The NSYNC singer was at Ayu Dayclub at Resorts World on Sunday when Nelly brought him onstage for a surprise performance ... and the crowd went bananas.

TMZ obtained video of the Lance-Nelly gig ... and they performed their hit from back in the day, "Girlfriend," which was a collab between NSYNC and Nelly.

Justin Bieber was photographed having what appears to be a smoking good time with some buddies in a secluded house, prompting feedback from a few of his fans about his possible marijuana use.

The Grammy-winning musician posted several Instagram pics over the weekend, showing him hanging out in a recording studio in a mountainous region with Aussie singer Eddie Benjamin and another dude.

Bieber's reportedly somewhere in Iceland ... and, in one of the snaps, Bieber is seen kicking back in a chair and taking a hit off what looks like a bong. Another photo captures Bieber standing next to Benjamin, who is puffing on a cigarette, as the other guy sits on a couch. A third photo features Bieber gazing into the camera, while wearing baggy sweats with a pink skull cap.

Lady Gaga knew nothing about the alleged bomb plot at her concert or even in the immediate aftermath ... 'cause TMZ has learned cops didn't say anything to her -- she found out from the media!

A rep for the singer-songwriter tells TMZ ... the whole team learned of the alleged threat from news reports that surfaced this morning -- prior to and during the show, they didn't hear anything from the police or other authorities regarding potential risks.

So, Gaga didn't get the chance to choose not to perform -- 'cause she was sent out there without any knowledge of what might happen.

Seal and Heidi Klum's daughter turned 21 over the weekend, and it was complete with a heartfelt serenade from her famous father.

The model celebrated her milestone birthday in the early hours at Miami club, E11EVEN. Leni showed up around 1 AM in a party bus with around 20 friends.

The group sat at a VIP table, where a glowing sign bearing Leni’s name lit up and a parade of oversized alcohol bottles set the tone for the night.

Police in Brazil claim they disrupted a violent plot to detonate explosives at Lady Gaga’s record-breaking free concert that drew an estimated 2 million fans in Rio de Janeiro over the weekend.

According to Rio de Janeiro’s state police ... two people were arrested on Sunday in connection with the alleged planned attack, which was reportedly planned by a radicalized group that promoted hate speech against the LGBTQ+ community.

The officials said the group had been attempting to recruit teenagers online, encouraging them to participate in violent acts using Molotov cocktails and homemade explosives.