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Jennifer Lopez performed "I Luh Ya Papi" on American Idol last night, and the 44-year-old singer/actress pretty much stole the show in her sparkly denim daisy dukes. Or is that a romper? We can't even tell but we're blown away by her amazing bod!

Lopez was joined by past show contestants Pia Toscano, Jessica Sanchez and Allison Iraheta, and later on rapper French Montana joined the ladies onstage.

J. Lo posted a handful of photos to her Instagram and wrote "thank you" to her adoring fans, adding that she "had so much fun performing."

Check out her performance below!

It's sheer madness!

Rihanna may have publicly stated she doesn't wear bras -- but we're sure glad she wears underwear!

On Thursday night, Bad Gal Riri opted for a see-through plastic skirt, which exposed her pink underwear for all to see, to dine out at her favorite restaurant, Giorgio Baldi, in Los Angeles' ritzy Pacific Palisades area. While most restaurant patrons don't go for sheer skirts for a simple dinner -- Rihanna ain't your average gal! She just wore fur for a trip to the dentist -- so we really shouldn't be surprised by this sexy getup!

In addition to the revealing lace skirt, the 26-year-old wore a cropped sweater, matching lace oxfords -- and of course some hot pink bikini-cut briefs! The oh-so-mercurial performer also traded in her new blunt bob for a Rapunzel-like pony tail. Don't get too attached to this -- she'll probably have a new look in a few days.

Over the years, we've learned not to question the "Diamonds" songstress' unique fashion choices and accept the sexed-up singer for the sexed-up singer she is.

What?! Nooooooooooooooooooooo! OUR EYES HAVE SEEN TOO MUCH!

If your corneas are burned out now, we totally get it and we are sorry -- we're just doing our job reporting the news.

On Thursday, Madonna posted a pic of her hairy underarm situation and we definitely aren't loving it.

Along with the "sexy" pic, Madonna wrote, "Long hair...... Don't Care!!!!!! #artforfreedom #rebelheart #revolutionoflove."

Gross!

We get that the Material Girl looooooves to break the rules -- but does she have to tackle society's accepted practice of underarm grooming?! We know the singer is on a quest to prove that women in their fifties are still sexy -- but this is just a lot for the eyes to handle. Yes, Madge, you're 55, you've got a rockin' bod and you still bang super young dudes. We get it! All hail Madonna, patron saint of cougars the world over.

Now shave your arm pits and let's get on with it.

After enduring grueling morning workouts, Kim and Khloe Kardashian definitely earned a reward.

The sisters treated themselves to froyo on Thursday at Los Angeles' Yum Yum Yogurt. While Kim dressed down for the occasion in distressed light-wash jeans and a grey tee, sister Khloe opted to make a fashion statement.

The youngest Kardashian sister paired her white jeans with a racy top. Her blouse was almost completely see through, aside from a "Parental Advisory" warning label that covered up her breasts. She added even more edge to the look with a vampy burgundy lip. Both girls sported sky-high strappy heels.

While Kim attended Barry's Bootcamp yesterday, Khloe worked out at her regular gym in Beverly Hills.

Kim seems to be stepping up her exercise regime in preparation for her upcoming Parisian wedding to Kanye West. The reality star spent the majority of her day pampering herself. She headed to Epione Cosmetic Laser Center after working out, then got a manicure and pedicure with her sis after grabbing yogurt together.

Khloe, on the other hand, is still working on her revenge body after separating from husband Lamar Odom. Although she filed for divorce over three months ago and is moving into a new home, Lamar still hopes to repair their broken relationship.

"I want to make it work with Khloe," he told In Touch magazine. "I'm going to see Khloe. I'm going to see her soon."

Those sound like the words of a desperate man to us.

Selena Gomez posted a picture of herself playing with her adorable baby sister Gracie following ridiculous reports that she's pregnant with boyfriend Justin Bieber's twins.

The Instagram shot shows the singer hugging her 9-month-old "sissy" while lying on the ground. Both are smiling from ear to ear. Gomez's mom, Mandy, and her husband Brian Teefey welcomed Gracie last summer after Mandy suffered a miscarriage in late 2011.

According eBuzzd.com, Selena is expecting two babies. The report even included an image of a fake sonogram.



While she's surely not having two kids, she did hang out with two friends on Thursday. Selena posted a photo of herself on a girls' night out with Zooey Deschanel and another gal pal. The ladies hung out at West Hollywood's Soho House.

Who knew these two were friends? Hollywood is a small town, after all.

Now that's motivation.

Ashley Tisdale proved just how serious she is about her fitness on Thursday when she crammed multiple workouts in a single afternoon in between business meetings.

"Did yoga then stair master for 45 min in between meetings #motivated #getit," she tweeted yesterday.

It appears as though the High School Musical star's fiance, Christopher French, has rubbed off on her. The former Disney darling sported a rocker chic outfit, complete with a leather jacket over a black tee emblazoned with a happy face and crossbones, while heading to yoga in Beverly Hills.

Ash and Chris got engaged last August when the musician popped the question on top of New York's Empire State Building after eight months of dating. The actress might be trying to stay fit for the upcoming nuptials.

Ashley wants a small, private wedding.

"I have a wedding planner so that's a lot easier," she told E! News. "I'm definitely a perfectionist, so I'm definitely involved with certain things that you'd think I'd be relaxed on. I just want it to be perfect."

Perfectionist may be an understatement.

Someone's ready for spring!

Reese Witherspoon left an office building in Beverly Hills today, and the actress looked super hip in ankle boots, a patterned minidress, and a fedora. It seems she's taking a page from Kate Bosworth's book of style!

We wonder what her meeting was regarding? Maybe her new business endeavor?

The Oscar winner is following in Gwyneth Paltrow's footsteps by launching her own lifestyle company! The blonde beauty has reportedly hired C. Wonder president Andrea Hyde to act as CEO, and apparently the brand will have a heavy Southern influence, since the mother-of-three hails from Tennessee.

She certainly likes to keep her plate full of projects!

On Thursday Hilary Duff stepped out in Beverly Hills, and before running errands she grabbed a cup of coffee at Starbucks. Seeing as it's her son Luca's second birthday, it looks like she's going to need the extra boost to keep up with her little man today!

Hil posted some adorable photos on Twitter, and we're not sure what she and estranged hubby Mike Comrie have planned for their adorable tot, but we're sure she's going to upload more pics later.

This one (which Hil captioned, "You make each day better and better Luca Cruz .... The brightest star" -- awww!) is our personal fav: