Calling All Hearts (feat. Robin Thicke & Jessie J)

DJ Cassidy recruited Robin Thicke and Jessie J to perform the vocals on this exuberant song. The track also features contributions from Chic's Nile Rodgers, Rufus drummer John "JR" Robinson, Michael Jackson's horn and string arranger Jerry Hey, and multiple members of Earth, Wind & Fire.

The song pays tribute to the golden era of Club music, and like the rest of DJ Cassidy's debut album, it honors the disco era of late '70s and early '80s by purposely avoiding modern studio techniques like sampling and recycling established material. "Four years ago, I set out on a mission to bring the greatest and most universal dance music of all time back to the airwaves, back to nightlife, back to the dance floor," Cassidy told Rolling Stone.

This was co-written by hitmaker Claude Kelly, who also co-penned Jessie J's hit single, "Price Tag."