WATCH: Idina Menzel goes childlike with classroom instrument take of 'Let It Go' on 'The Tonight Show'

It's pretty much universally agreed that it's super adorable when former Late Night and current Tonight Show host Jimmy Fallon teams up with one of music's big stars to do a classroom rendition of a pop hit. Last night (March 3), Oscar performer and Frozen actress Idina Menzel stopped by The Tonight Show Starring Jimmy Fallon to take on "Let It Go" with the talk show host, The Roots and some kazoos.

After a slightly rushed (though still strong) performance at the Academy Awards on Sunday night, Menzel was notably more relaxed at The Tonight Show, smiling alongside Fallon and The Roots and laughing when she rushed and sang a line before its due time.

Other than Menzel's sunshiney voice, the thing that continues to be impressive about these kiddy-inspired performances is the fact that The Roots can play kazoos, bells and tambourines and still manage to make the child-version of the track sound like the original. It just goes to show that solid musicianship spans the age bracket for instruments.

Watch the smiley take below:

Menzel joins the likes of Carly Rae Jepsen, Mariah Carey, Robin Thicke and the cast of Sesame Street, with her classroom instrument performance.

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Idina Menzel, The Tonight Show Starring Jimmy Fallon