Andy Samberg Conner Friel Jorma Taccone Owen Bouchard Akiva Schaffer Lawrence Dunn Sarah Silverman Paula Klein Tim Meadows Harry Duggins Maya Rudolph Deborah Joan Cusack Tilly Imogen Poots Ashley Wednesday Chris Redd Hunter Edgar Blackmon Eddie James Buckley Sponge Evan Fine Ten-Year Old Conner Maxwell Jenkins Ten-Year Old Owen Elliott Smith Ten-Year Old Lawrence Ahmir-Khalib Thompson Ahmir-Khalib Thompson Carrie Underwood Carrie Underwood Nas Nas Usher Usher 50 Cent 50 Cent Nicholas Azarian Quirky Kid Ringo Starr Ringo Starr Simon Cowell Simon Cowell Adam Levine Adam Levine Akon Akon Pink Pink A$AP Rocky Rakim Mayers Mario López Mario López Will Arnett Main CMZ Reporter Eric André Dreadlocked CMZ Reporter Emma Stone Claudia Cantrell (uncredited) Bill Hader Zippy Joanna Newsom Steam Punk Doctor RZA RZA T.I. T.I. Pharrell Williams Pharrell Williams Martin Sheen Martin Sheen Will Forte Bagpipe Player Snoop Dogg Snoop Dogg Carlena Britch Dancer Dave Franco Dave Franco (uncredited) Justin Bieber Justin Bieber (uncredited)