Jennifer Lopez & Marc AnthonyWhen Grammy-winning crooner Marc Anthony entertains an audience of panting females, they roar with applause. Performing his Spanish ballads barefoot while clad in a sexy tux, his connection with the audience is explosive. But his passion surges to a new level when he sees how much the the fans idolize his wife, Jennifer Lopez.

"It's one thing to watch audience reaction to Marc, who has Frank Sinatra-like magic with the crowd," observed a music source. "But to see thousands of female fans cheering for Jennifer is amazing. Marc's love and respect for her is intoxicating, and the crowd goes wild."