Stephen Colbert Sings "Friday" for Jimmy Fallon

Keeping a promise he made with host Jimmy Fallon earlier in the week, Stephen Colbert performed Rebecca Black's "Friday" on "Late Night" on Friday (April 1).

Colbert's long-awaited performance of the ubiquitous anthem came after he pledged $26,000 to DonorsChoose.org on Jimmy's behalf.

Fallon then promised that, if his fans - the "12:37 time sluts" and other "Fallonites" - donated $26,000 by Friday, the "Colbert Report" host would visit the show to perform the YouTube hit in person.

Fans of the funnyman went above and beyond, doubling the original intended amount while NBC Universal kicked in another $26,000.