Harper had a cameo appearance in an episode of the television show "Corner Gas," which aired March 12, 2007. He owns an extensive vinyl record collection and is a fan of The Beatles and AC/DC. In October 2009, he joined Yo-Yo Ma on stage in a National Arts Centre gala and performed "With a Little Help from My Friends". He was also accompanied by Herringbone, an Ottawa band with whom he regularly practises. He received a standing ovation after providing the piano accompaniment and lead vocals for the song.