Perry who stayed true to her, character, "Smurfette," wearing a blue Tadashi Shoji dress, brought her grandmother Ann Hudson, who previously attended the 2011 Grammy Awards with her.

Perry's on again, off again boyfriend John Mayer was not at the premiere however, when talking about her new music she dropped a hint that the two are back on or at least working together.

Ben asked if there was any chance of John and Katy collaborating on a song, Katy playfully responded with a wink, "We're doing a lot of collaborating."