Birthday chords by Katy Perry

"Birthday" is a disco song recorded by American singer-songwriter Katy Perry for her fourth studio album. It is the fourth single from PRISM album. This upbeat jam finds Katy promising to give some lucky person the best birthday ever. The exuberant track was written by the singer in collaboration with Bonnie McKee, Henry Walter, Max Martin and Dr. Luke. The same team also penned Prism's lead single, "Roar." Katy sings some of the song in a Mariah Carey-esque higher register. "I wanted to do something that Mariah Carey would have put on her first record," Perry said while introducing the song during Prism's listening party. The song's live brass is provided by the Saturday Night Live house band horn section, which gives us another Mariah Carey connection. The multi-octave songstress employed this same horn section for her performance of "If It's Over" during her 1992 MTV Unplugged special. The song finds Perry seducing a lover with a bunch of sexual innuendos. Bonnie McKee told MTV News: "The bridge actually the thing about the 'birthday suit' and the 'big balloons,' I was not in the room for that. I had no idea. I didn't hear it again until it had been mixed when I came in and listened to the bridge and I was like 'Katy, what did you do when I left the room?' It was really funny. I was laughing out loud." Music video for the track was primarily recorded with hidden cameras, it features Perry disguised as five different characters in birthday parties and other celebrations. The visual attained mixed opinions from critics, who appreciated its theme but criticized her character portrayal. Read more on Last.fm. User-contributed text is available under the Creative Commons By-SA License; additional terms may apply.