This day in 2012: Brad Paisley appears on ‘South Park’ Posted on April 25, 2019 by Bob Ballard This day in 2012: Brad Paisley appeared in the Season Sixteen episode, “Cartman Finds Love”, where he sings the national anthem before the L.A. Clippers and Denver Nuggets basketball game. He also performed “I Swear” in a duet with Eric Cartman.