[Prod. by Dr. Luke, Max Martin, Cirkut] [Written by Katy Perry, Dr. Luke, Max Martin, Bonnie McKee, Henry Walter] [Verse 1] I heard you're feeling nothing's going right Why don't you let me stop by? The clock is ticking, running out of time So we should party all night [Pre-Chorus 1] So cover your eyes, I have a surprise I hope you got a healthy appetite If you wanna dance, if you want it all You know that I'm the girl that you should call [Chorus] Boy, when you're with me, I'll give you a taste Make it like your birthday every day I know you like it sweet, so you can have your cake Give you something good to celebrate [Post-Chorus] So make a wish I'll make it like your birthday every day I'll be your gift Give you something good to celebrate [Verse 2] Pop your confetti, pop your Pérignon So hot and heavy 'til dawn I got you spinning like a disco ball All night they're playing your song [Pre-Chorus 2] We're living the life, we're doing it right You're never gonna be unsatisfied If you wanna dance, if you want it all You know that I'm the girl that you should call [Chorus] Boy, when you're with me, I'll give you a taste Make it like your birthday every day I know you like it sweet, so you can have your cake Give you something good to celebrate [Post-Chorus] So make a wish I'll make it like your birthday every day I'll be your gift Give you something good to celebrate [Bridge] Happy birthday... So let me get you in your birthday suit It's time to bring out the big balloons So let me get you in your birthday suit It's time to bring out the big, big, big, big, big, big balloons [Chorus] Boy, when you're with me, I'll give you a taste Make it like your birthday every day I know you like it sweet, so you can have your cake Give you something good to celebrate Boy, when you're with me, I'll give you a taste Make it like your birthday every day I know you like it sweet, so you can have your cake Give you something good to celebrate [Post-Chorus] So make a wish I'll make it like your birthday every day I'll be your gift Give you something good to celebrate [Outro] Happy birthday...