Carly Rae Jepsen Plays Quirky 'Call Me Maybe' with Fallon, Roots: Watch.

Carly Rae Jepsen's chart-conquering "Call Me Maybe" has taken over late night.

In addition to taking the "Late Night" stage on Thursday night, the singer joined host Jimmy Fallon and house band the Roots to perform a unique version of the hit song, played with "elementary school classroom" instruments ranging from bongos to a kazoo. The backstage performance found Jepsen herself with instrument in hand, tapping a triangle as she belted the song along with Fallon.

The singer performed a less quirky take on the song with her usual band on Thursday night's episode, with the classroom version hitting the web on Friday. Thanks to the support of Justin Bieber and a viral video nearing 100 million views, the Canadian musician's "Call Me Maybe" has climbed the charts since making its U.S. debut. It's spent 15 weeks on the Hot 100, sitting pretty at No. 2 on this week's chart under Gotye's "Somebody That I Used to Know."