Spotted!

On Saturday, Feb 27, Mariah Carey (pictured) wrapped her 25-city tour in Las Vegas and celebrated it with her official concert after-party at Haze Nightclub at Aria Resort & Casino. The songstress, sans hubby Nick Cannon, in a skin-tight navy blue Herve Leger dress, was presented with a two-tier pink cake that had the name of all her albums on it alongside many butterflies, as friends cheered on and congratulated her on the tour's success.

Jesus Luz (sans Madonna) ordering room service to his E-WOW Suite at W Montreal on Feb 27. Jesus was in town for a DJ gig at Club Unity.

While in Miami on Feb 28 hosting the Amstel Light Burger Bash during the South Beach Wine & Food Festival, Rachael Ray made sure to balance her food indulging experience with a workout at David Barton Gym Gansevoort South, where she was spotted hitting the treadmill everyday.

On Friday, Feb 26 Charlize Theron enjoyed a night out in Vegas at The Bank Nightclub at Bellagio where she partied until the wee hours of the morning. The Academy Award-winning actress, danced the night away and sipped on vodka sodas with several of her guy friends who danced on the club's banquettes while taking shots of Stoli blueberry.

On Saturday, Feb 27 at Haze, singer Ciara took the stage and rocked the crowd with performances of her hits "Goodies" and "Oh," driving partygoers, including boxer Floyd Mayweather Jr., Ellen Pompeo's hubby Chris Ivery and Joe Jackson, wild while screaming fans sang and danced along.

Tom Bergeron thinks Buzz Aldrin will win Dancing With the Stars because "He made it to the top once before!” while on the red carpet for the Academy of Television Arts & Sciences “An Evening with Modern Family."

Rose McGowan at a Vanity Fair and Hudson Jeans hosted DJ Night at the Palihouse Holloway in Los Angeles.

Grey Goose and Alfre Woodard hosting a dinner at a private residence in Beverly Hills to celebrate African American women in film, including this year's Best Actress Oscar Nominee Gabourey Sidibe.

Ethan Hawke, Wesley Snipes and Don Cheadle at the Brooklyn’s Finest premier party at the Empire Hotel in NYC.

Maggie Gyllenhaal at Mondrian's Asia de Cuba in West Hollywood.

Kevin Jonas and his new bride, Danielle Deleasa having a romantic dinner at Nobu West Hollywood.

Portia de Rossi at the Stella McCartney shopping and brunch to benefit the Guthy Jackson Charitable Foundation.

2010 Oscar Nominee Gabourey Sidibe at the Women In Film cocktail party in L.A.

Lil’ Jon and Scott Disick at Coco de Ville Miami's Coco Tuesday night party "Favela Chic".

Ryan Seacrest saying his wedding present for Simon Cowell with be his presence while at the Wrap.com’s celebration of the nominees of the 2010 Awards Season with an Exclusive Preview of Culina at the Four Seasons Los Angeles at Beverly Hills.

Demi Moore and Ashton Kutcher at the 3rd Annual Pre-Oscar Hollywood Domino Gala Benefitting Artists for Peace and Justice Presented by Quintessentially & Maybach at Bar 210 in Beverly Hills.

Madonna, Elton John, Quentin Tarantino, Jennifer Lopez and Natalie Portman among the first stars to check out the new Soho House in West Hollywood at the RAAD Grey Goose dinner.