Ben Affleck is going gaga over Jennifer Lopez. The Oscar winner — who's currently shooting the crime comedy Gigli with the singer-actress — is explaining why he took out ads in the Hollywood trades last month singing the praises of the singer-actress. Affleck tells Access Hollywood that he was ashamed of the "preconceived notions" he had about working with the alleged diva. "So, I thought I'd write a paragraph saying what a professional, decent person I think she is and how kind she is," he explains. "The ad was more aimed at other people than it was to her, just because there is so much negativity — people gossip and criticize and bicker — I think it's nice and rare when you meet someone who you think is actually exceptional and worth praise. I think she is a really great woman, intelligent, smart, capable and professional all the way. I thought that was something people might want to know." Paging Cris Judd...