WATCH: Mariah Carey, Jimmy Fallon & The Roots

Mariah Carey joined Jimmy Fallon and The Roots – playing a collection of classroom toy instruments – for a rendition of the diva’s holiday classic, “All I Want for Christmas Is You,” filmed backstage on the late night host’s show Tuesday night.

Fallon showed his range during the three-minute, 36-second performance by playing a wood block, tambourine, bass drum and kazoo and a choir of four young elementary-school age girls popped into the frame every time the chorus kicked in.

But the star of the song was Carey herself, whose smooth pipes managed to even soar over Mark Kelley’s Fisher Price xylophone.