3:36 Katy Perry - Birthday (Lyric Video) 8:01 Katy Perry - Birthday (Official) 3:37 Katy Perry - Birthday (Lyrics) 3:36 Katy Perry - Birthday 4:02 Katy Perry - Birthday (Live at BBC @ Glasgow 2014) 4:25 5☆ stars - Birthday - Just Dance 2017 - Kinect 3:40 Katy Perry - Birthday (Lyric Video) 3:35 Birthday Music Video 3:36 Katy Perry - Birthday (Lyrics) 5:06 Katy Perry Birthday @ Billboards 2014 1080p HD 3:34 Katy Perry, Zayn - Birthday X Pillowtalk (TikTok Mashup) [Lyrics] 3:00 Katy Perry - Birthday (sped up) 3:36 Katy Perry - Birthday (Lyrics) 5:40 Katy Perry - Birthday (Prismatic World Tour Audio) 4:08 Katy Perry - Birthday ( Slowed + Reverb ) 3:30 Katy Perry - This Is How We Do (Official) 4:22 katy perry - birthday ( slowed + reverb )