Hot on the heels of Miley Cyrus [1], Sam Smith is the latest celebrity to join James Corden for a spot of Carpool Karaoke [2] on The Late Late Show [3]. As you'd expect, the pair take great joy in singing along to some of Sam's biggest hits, including "By Your Side" and "Money on My Mind," before talk turns to Sam's obsession with a certain girl band. "I'm a Harmonizer!" he admits, before bursting into Fifth Harmony's "Work From Home." Things really take a turn when James puts in a phone call and invites some special guests along for the ride. Watch Sam's reaction, plus so much more, in the video.