Katy Perry - Birthday (Live at The Prismatic World Tour) - YouTube
Entertainment Tonight - Katy Perry's Surprise Birthday Party! | Facebook | By Entertainment Tonight | Join us as we celebrate the 🍬 sweetest 🍭 surprise birthday party for Katy Perry! 👑 Happy Birthday, Katy! 🎂
Katy Perry: Birthday (Music Video 2014) - IMDb
Katy Perry Gets Her Pizza-Related Birthday Wish | Billboard – Billboard
Katy Perry: Birthday Cover by smsmsmw on DeviantArt
Birthday by Katy Perry | Album | Listen for Free on Myspace
Katy Perry - Birthday (Lyric Video) - YouTube
Katy Perry Birthday (REMIXES) CD Single – borderline MUSIC
Katy Perry Birthday Party – Delicate Details
Katy Perry – Birthday (2014, CDr) - Discogs
Katy Perry - Birthday | Wanted something official looking an… | Flickr