Star Tracker: Daddy Yankee, Christina Aguilera, Cameron Diaz, Alex Rodriguez and more...

— Daddy Yankee says he would love to collaborate with Dominican icon  Juan Luis Guerra. "I've always wanted to work with Juan Luis, [he's] my favorite artist," the Big Boss shared. 

— On Sunday, Christina Aguilera performed at her friend Mary J. Blige's "Honors Concert" at Hammerstein BallroomThe event, which benefited FFAWN's Scholarship Fund, will help send young women to college with full, four-year scholarships.

— Rumor has it that Alex Rodriguez is "incredibly jealous" of Cameron Diaz's relationship with her ex Justin Timberlake. Reportedly A-Rod even stopped by the set of Cameron and Justin's movie Bad Teacher several times to spy on the former couple. 

Ximena Navarrete is getting emotional about her year-long reign as Miss Universe coming to an end. "It's been a crazy year and in a few months I'll be handing over the crown. I'll miss it because you get used to the pace of work, but I'm looking forward to new things."

Think Don Omar is over Jackie Guerrido? Think again! Apparently the Don was avoiding press at all costs during the Premios Billboard last week out of fear of being asked about his ex-wife. He was so paranoid that he threw a fit when someone dared to take a photo of him backstage and threatened to leave!