Miley Cyrus [1] and Katy Perry [2] shared a funny moment in the audience during the Grammy Awards on Sunday night. While posing for photos together during the show, Miley held her hand under Katy's chest, seemingly showing off her ample bosom to the camera. Katy returned the favor with a similar pose, but instead of smiling, the recent Super Bowl halftime show performer looked underwhelmed by Miley's somewhat smaller breasts. Despite their different cup sizes, both Miley and Katy looked gorgeous at the awards show; Katy stunned in a beaded Zuhair Murad dress [3], while Miley showed skin in a black Alexandre Vauthier cutout number [4]. Check out more highlights from the Grammys [5]!