Rihanna has been spending late nights at a New York recording studio, but it hasn't kept her adoring fans from waiting outside to catch a glimpse of the sexy songstress. However, that security guard meant business!

Wearing shredded jeans, a hoodie and sneakers ... RiRi and her long black wig came face to face with a sea of cameras and even iPads. Sheesh! Guess everyone wants a piece of the "Where Have You Been" singer.

What a life!

What girl wouldn't adore a shopping trip to Chanel with a seemingly endless credit card limit?

Lindsay Lohan did just that, as she stepped out in NYC on Wednesday afternoon -- minus gal pal Samantha Ronson -- for a lengthy shopping spree at the fabulous French fashion house, before heading back to her hotel, on Wednesday evening.

After spending the weekend in Washington D.C. for the 98th Annual White House Correspondents' Dinner, La Lohan decided to take a mini vacation in The Big Apple, before heading back to LA to begin shooting the upcoming Lifetime flick, Liz and Dick, on June 4.

Let's hope Linds can get it together by then, because after that Glee cameo, her career can't handle another fiasco right now!

Looking super sexy in a low-cut body-hugging red ensemble, J.Lo seemed a bit tired as she exited the American Idol studios after a long day of filming in Hollywood, on Wednesday.

Is it just us, or has Jennifer Lopez been rocking the most fabulous wardrobe of any America Idol judge thus far?

La Lopez has just announced a tour with Enrique Iglesias, and is also gearing up for the May 18th release of her new movie, What to Expect When You're Expecting, but the 42-year-old superstar says being a mom always comes first.

The singer recently opened up to Glamour UK on being a celeb mom, confessing of 4-year-old twins Max and Emme: "It takes a village - you do really learn what that means when you have kids. It's a juggling act, just like any single mom. They just started school, three days a week. I have to travel without them here and there, so it's really important they're surrounded by family when I'm not there."

Jen added, "They come first, though. I like to wake up with them. I like to put them to bed. That's how we do it so they feel loved, happy and what they are - the most important thing in my life." Aww!

The premiere of Justin Bieber's "Boyfriend" is set to debut tonight during MTV First, and we caught up with the 18-year-old as he was hitting the studio to put some finishing touches on his latest track in Hollywood, on Wednesday afternoon.

We love that matte Range Rover!

The video was shot in LA last month with a Selena Gomez look-a-like, and it's the lead single from Bieber's June 19 album release, Believe which will premiere tonight during MTV First: Justin Bieber live at 7:50 p.m. ET.

After the premiere, "The Biebes" will chat with Sway for 30 minutes on MTV.com, about his upcoming album, and will also be taking questions from fans about his new track via Twitter!

Are you excited for the world premiere of "Boyfriend?"

Miley Cyrus is addicted to pilates!

The former Disney star showed off her tough-girl side in a sexy black leather bicker jacket, black tights and a Harley Davidson t-shirt, while on her way to her usual class in West Hollywood, on Wednesday afternoon.

Cyrus is such a dog lover, that she jumped at the chance to rescue an adorable pup after he was found abandoned outside supermarket on Tuesday afternoon.

The Hannah Montana star shared via Twitter, "He was left in a box in front of Walmart. I don't understand how people can be so cruel. That's why we named him Happy."

Adorbs!


Twitter

After spending Tuesday night cozying up to former flame Samantha Ronson at Le Baron in New York City, Lindsay Lohan was spotted leaving her hotel on Wednesday afternoon in a sexy black ensemble. Someone's awfully dressed up for a casual day on the town! Think the ladies will reunite again tonight? Given how well things went yesterday, we're thinking yes!

"Lindsay and Sam were whispering and laughing and they left the club holding hands," an eyewitness at Le Baron tells X17online exclusively. "They didn't care who saw them, and they definitely seem to be back on. It was just like the old days -- they couldn't get enough of each other!"

And it's not even Mother's Day yet ... talk about the best daughter ever!

Paris Hilton and her mom were snapped at The Grove in Los Angeles this afternoon, and the ladies chatted with Extra's Maria Menounos about Kathy's new clothing line, the aptly titled Kathy Hilton collection.

P was also joined by her aunts, and she tweeted, "At @TheGroveLA for @KathyHilton's Fashion Show with @KathyHilton @KyleRichards18 @KimRichards11 & my beautiful cousins. I love my family!" Hey, so do we! And that white dress? Loves!

Now that the J's have finally popped, get ready for the K's!

Hollywood has been on bump watch for some time now with the recent celebrity baby boom, and now that Jennifer Garner and Jessica Simpson have given birth, it's about that time for Kristin Cavallari and Kourtney Kardashian!

The Kim and Kourtney Take New York star looks like she's still busy with last minute preparations, as we spotted her leaving Bel Bambini boutique on Wednesday. The expectant mama kept it comfortable in jeans and a white t-shirt, and we can't tell you how refreshing it is to see one of the Kardashian Klan NOT dressed to the nines. Look at that cute baby bump!

Was Mason's mommy headed to the bridal shop after picking up baby booty? If you believe recent reports, Miss K and her longtime boyfriend and baby daddy Scott Disick are planning to tie the knot in a televised ceremony for E! in Mexico.

Poor Kim! The only unmarried sister? Oh the horror!