Terrance and Phillip

Terrence and Phillip on the Ed Sullivan Show

While primarily known as a comedy act, the "Terrance and Phillip: Behind the Blow" episode of South Park (first aired 18 Jul 2001) showed that this Canadian duo first came to fame as a child vocal duo.

In the 1999 film South Park: Bigger, Longer & Uncut, they sing a ribald song about uncles.