Spears shows off Sean Preston in the new issue of PEOPLE. Plus: Jennifer Garner, Ashton & Demi, and more

THEY'VE GOT IT

Pharrell and Gwen Stefani duet on their hit "Can I Have It Like That" at the American Music Awards in Los Angeles on Tuesday. At the end of the song, it was announced that Stefani had won favorite female pop artist – but she could barely hear it over the music. "I guess whatever I won, I just want to say thank you to the fans," she said.