Evan Ross and Jake Hoffman partying at Juliet Supperclub for the launch of the NYC hotspot’s new hipster party.

Matthew Fox eating in Nobu before gambling inside the Hard Rock Hotel & Casino.

Hugh Jackman, tennis great John McEnroe and New York Rangers goaltender Henrik Lundqvist cheering the New York Knicks onto victory at Madison Square Garden.

Lisa Rinna, Brooke Burke and Alison Sweeny celebrating the holidays at Denise Richards’s Winter Wonderland by picking up cozy sweaters from Spy Zone. 

Jamie Lynn Sigler cheering on the New York Rangers at Madison Square Garden alongside her family, while Tim Robbins sat nearby with his son.

Holly Madison checking out Untamed Illusions, starring The Fercos Brothers, at Planet Hollywood Resort & Casino before going backstage to play with the cubs.

Celine Dion having dinner with her husband Rene Angelil and a large family group, including several children at the Wolfgang Puck Café Dining Room in downtown Disney World in Orlando, Florida.

Britney Spears working out (with a full face of makeup running down her face) at the gym inside the Mondrian Hotel in West Hollywood.

Mariah Carey joining hubby Nick Cannon in the DJ booth at Borgata Hotel Casino & Spa’s club mur.mur following her sold-out concert at the Borgata Event Center.

Nelly, Diddy & John Mayer partying hard at new Vegas hotspot Vanity inside the Hard Rock Hotel & Casino.

Kris Allen & his wife Katy having New Year’s Eve dinner at Simon at Palms Place. Kris enjoyed Seared Moulard Duck Breast and Katy had the Ahi Tuna.

Adam Levine and Jason Segal enjoying dinner with 11 other pals at N9NE Steakhouse inside Palms Casino Resort.

Leighton Meester taking the stage for four songs at TAO in Vegas after enjoying an Italian feast at LAVO.

Adrian Grenier and his band "The Honey Brothers" toasting with Maestro Dobel Diamond Tequila at his New Year's Eve party at The Roxy in Boston.

Kirstin Dunst enjoying a late lunch of miso soup and chopped salad at Simon at Palms Place on New Years Day. The night before the actress joined Jason Segel and Maroon 5 to welcome in 2010 at The Pearl.

Laura Prepon, Tia and Tamera Mowry toasting with Svedka cocktails on New Years Eve with a performance by Adrian Vera at SHIN restaurant in Hollywood.

Hugh Hefner with girlfriends and "The Girls Next Door" co-stars Crystal, Karissa and Kristina ringing in 2010 with a "Coconut Grove" themed gala at the Playboy Mansion Diablo Cody and Bridget Marquardt. 

Christina Aguilera, who was joined by husband Jordan Bratman, her sister Rachel and all of her dancers, raving about her penthouse suite at The Venetian and welcoming in 2010 at TAO.

Mickey Rourke, Gerard Butler and a very cozy-looking Nick Lachey and Vanessa Minnillo at Heineken’s New Year’s Eve at AVENUE in NYC.

Leona Lewis watching Robin Thicke do his thing on-stage at The Bank Nightclub while Fallout Boy’s Pete Wentz partied across the Strip at JET.

Will.i.am turning the tables at PURE nightclub in Vegas following his hosting duties with the Black Eyed Peas on NYE.

Aubrey O’Day checking into her swanky Rock Star suite with puppies Ginger and Mary Ann hours before her midnight performance for 4,000 fans visiting the Hard Rock Hotel San Diego for its NYE 2010 bash.