Madonna paid a visit to David Letterman earlier this week, and yesterday she called in to chat with Ryan Seacrest on his radio show. While she's not one to shy away from controversy, it seems like Madonna was actively trying to create drama when she implied that Jennifer Lopez tries to copy her. Of J. Lo's visit to one of her shows, Madonna said, "I was getting super-sharp looks from [Lopez] . . . . Whenever artists come to see my show, they're studying me." A diva fight could be just what Madonna needs to promote her upcoming album Celebration, but tell us what you think of Madonna's implication that J. Lo copies her — is it plausible or pretentious?