Katy and her diva posse

DIVA POWER: Speaking of Katy, as we do immediately below, her popularity appears to extend to her peers, as this prime photo op, shot last Wednesday at a 97.1 AMP-hosted meet-and-greet in Hollywood, dramatically attests. Surrounding KP are her BFFs Sara Quin, Sara Bareilles, Kacey Musgraves, Ellie Goulding, Bonnie McKee and Tegan Quin. (10/30a)