His celebrity interviews can be found at the Georgia Straight Online, detailing a range of celebrities from William Shatner to Salman Rushdie and including such A-Listers as Emily Blunt, Michael Cera, and Terry Gilliam.
The song is prominently featured in the film Magic Magic, both in its original version as well as being sung by Michael Cera.
Nick & Norah's Infinite Playlist was made into a movie directed by Peter Sollett and starred Michael Cera and Kat Dennings as Nick and Norah.
The role eventually went to Michael Cera, while Clark landed a smaller role as jock Steve Rendazo.
The song was also featured in the 2007 American comedy film "Superbad" where it is sung by Michael Cera.
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In March 2013, Kellison launched the YouTube channel Jash with partners Sarah Silverman, Michael Cera, Tim & Eric, and Reggie Watts as well as the Video Podcasting Network (featuring Video Podcasts from Adam Carolla, The Earwolf Network, Norm Macdonald and Doug Benson (“Getting Doug with High.”)
On January 28, 2014, TheWrap revealed that Seth Rogen, James Franco, Jonah Hill and Kristen Wiig will lead in the film, while the other cast includes Edward Norton, Michael Cera, David Krumholtz and Nick Kroll.