Rita Ora performed at the Highline Ballroom in New York City on Monday evening, and after a few minutes onstage, the 22-year-old singer ripped off her pajama-inspired top and revealed her stomach. If you've got it, flaunt it! Or maybe she was just getting sweaty? Either way, she put on quite a show! Rita later tweeted at Jay-Z, "I duno why I can't stop talkin about last night it was amazing especially when you got your big brother with you."

While it seems like Rita and former fling Rob Kardashian are no longer at each other's throats on Twitter, Rob gas spoken out about his current relationship status, telling Ryan Seacrest, “I’m very, very single. I’m very, very happy. For the first time in a long time which is good. Honestly, it’s all about workin’ out in the new year and businesses. I’m really focused on me. This is just the beginning.”

Jeremy Piven and a lady friend in a very low cut dress were snapped hanging out at Dei Frescobaldi restaurant in Miami, and these two sure look like they were having a good time!

In other news, last week Piven backed out of a plan to unveil a 19-story art installation at the InterContinental Miami, which featured an animated montage of silhouettes including a dancing woman. According to local reports, the artwork was deemed “too risque” by the Entourage star, who apparently thought it would be “bad for his image” to unveil. Piven’s rep tells the NY Post, “As soon as Jeremy found out what the content was, he wasn’t comfortable with participating. What he did do, that many others might not have, is attend the event ... stay until the end of the evening, and have a wonderful dinner." Um, ok!

kimkardashian.celebuzz.com

The Kardashians look bright and cheery in white for their annual family Christmas card.

Looks like 16-year-old Kendall Jenner(far right) has the winning pose. Such a beauty!

We love seeing Penelope in Kourtney's arms. Can't wait to see the little girl grow up in front of our eyes.

Here's a jingle for the Kardashians: Deck the halls ... with LOTS of money!

Giovanni Rufino/The CW

Gossip Girl has come to an end ... and whoa, SO much has been revealed!

The finale episode shows Leighton Meester's Blair tying the knot with Ed Westwick's Chuck, Blake Lively's Serena and Penn Badgley's Dan getting married and Michelle Trachtenberg‘s Georgina ending up with Desmond Harrington‘s Jack.

But the BIG reveal of the night .... who is Gossip Girl?! Click thru to find out ...

Annalynne McCord and co-star Jessica Lowndes showed off their abs on the set of 90210 on Monday in Venice, and even though the ladies must have been freezing, they were in good spirits!

The hit CW show is currently filming the fifth season, and can you believe that they hit their 100th episode earlier this month? It seems like just yesterday they announced that the classic 90s show was being revived with a hot (but relatively unknown) cast.

And what was newly engaged Shenae Grimes up to? Just uh, showing off her engagement ring for the cameras!

Christina Aguilera, Adam Levine, Blake Shelton and Cee Lo Green paid tribute to the victims of the Newtown school shooting with a special performance of Leonard Cohen's “Hallelujah” last night on The Voice.

Xtina and company were joined by host Carson Daly, Christina Milian, finalists Cassadee Pope, Nicholas David, and Terry McDermott, as well as other former contestants, and they each held a card with the name and age of the twenty children and six adults that were killed in last week's horrific shooting.

The show will crown their season three winner tonight, and The Killers, Bruno Mars, Kelly Clarkson and Rihanna are set to perform.

NBC

Megan Fox is a babe in blue!

The 26-year-old actress showed off her stunning post-baby bod in a Roland Mouret dress while appearing on The Tonight Show with Jay Leno. She had son Noel only two months ago!

Fox tells Leno, "Having an infant is difficult. It's a lot of work and I didn't hire any help because I overestimated my own abilities."

As for eventually hiring some help, Megan added:

"I said to Brian, "we have to get a night nurse or we're going to get a divorce because someone's got to sleep in this house or we're going to kill each other."

We hear ya, Megan!

Rihanna is the proud owner of an 11,000 square-foot mansion in the Pacific Palisades.

The 24-year-old "Umbrella" songstress, whose been promoting her 7th studio album Unapologetic, bought the gorgeous pad for $12 million.

RiRi's digs boasts 7 bedrooms, 9 bathrooms, top range kitchen, dining room with a 14-foot ceiling, media rooms, outdoor BBQ and bar area, swimming pool, a 6,000 square-foot back garden, a sun deck, 4-car garage, a hot tub and stunning panoramic views of the city.

Home sweet MASSIVE home!