"Heart Beat" is a pop song sung by Ross Lynch as Austin Moon in the episode of Diners & Daters of Austin & Ally. Austin sings this song to his crush, Cassidy, to show his feelings towards her. He performs it at the Melody Diner. Ally helps him write this song to get Cassidy to go out with him. In real life, the song was written by Ben Charles, Zach Porter, and Mike Daly. This song is part of the Austin & Ally Soundtrack.