Star Tracker: Shakira, Ricky Martin and Christina Aguilera

— Out and proud singer, Ricky Martin, who has been everywhere lately promoting his new memoir, Me, graces the cover of OUT magazine’s 100 Most Compelling People of 2010.

Christina Aguilera, who separated from her husband Jordan Bratman last month, opens up to late night talk show host, Chelsea Handler about life after filing for divorce in “Chelsea’s Big Interview Special,” airing tonight at 10 p.m. on E!

Jersey Shore star, Nicole “Snooki” Polizzi celebrated her 23rd birthday at Pacha nightclub in New York City over the weekend. The reality star was surrounded by her friends and family—but not by fellow reality star Kim Kardashian, who Snooki called “rude” for not attending her birthday party.

— If you were planning on watching J.Lo judge American Idol this spring on Tuesday nights, you might want to change your DVR settings. On Friday, FOX announced that the hit reality show would switch to a Wednesday and Thursday schedule for season 10.

Shakira shook her hips for Spanish royalty on Friday night at Palacio de los Deportes in Spain. Prince Felipe and Princess Letizia attended the She-wolf's concert to watch her perform songs from her latest album, Sale el Sol.