Popstar : Célèbre à tout prix

Joanna Newsom as Steam Punk Doctor Andy Samberg as Conner Friel Tim Meadows as Harry Duggins Usher as Usher 50 Cent as 50 Cent Ringo Starr as Ringo Starr Joan Cusack as Tilly Elliott Smith as Ten-Year Old Lawrence Questlove as Ahmir-Khalib Thompson A$AP Rocky as Rakim Mayers Kevin Nealon as Gary Sikes Eric André as Dreadlocked CMZ Reporter DJ Khaled as DJ Khaled Big Boy as Big Boy Danger Mouse as Danger Mouse Régine Chassagne as Arcade Fire Will Forte as Bagpipe Player Akiva Schaffer as Lawrence Dunn James Buckley as Sponge Mario López as Mario López Steve Higgins as Steve Higgins Martin Sheen as Martin Sheen Calvit Hodge as Dancer Robert Roldan as Dancer Bill Hader as Zippy RZA as RZA Seal as Seal Krystal Ellsworth as Dancer Sandra Rosko as Concert Fan (uncredited) Chris Redd as Hunter Nas as Nas Ashley Moore as Sarah Mike E. Winfield as Hunter's DJ / Hypeman Chester Tam as Club DJ Jimmy Fallon as Jimmy Fallon 'Weird Al' Yankovic as Hammerleg Lead Singer Nikeva Stapleton as Dancer Edgar Blackmon as Eddie Evan Fine as Ten-Year Old Conner Nicholas Azarian as Quirky Kid Danny Strong as Perspective Manipulator Andre Hyland as Lame Ass Dude Walter Jones as Angry Fan Mariah Carey as Mariah Carey Marielle Heller as Documentary Crew Member Ithamar Enriquez as Stage Manager Carlena Britch as Dancer Brandon Henschel as Dancer Emma Stone as Claudia Cantrell (uncredited) Chelsea Peretti as Brunette CMZ Reporter Jorma Taccone as Owen Bouchard James Poyser as The Roots Justin Timberlake as Tyrus Quash (uncredited) Dave Franco as Co-actor in the movie "Cube Theorem" (uncredited) Snoop Dogg as Snoop Dogg Michael Bolton as Michael Bolton Jasmine Hester as Conner's Entourage (uncredited) Lili Sepe as Teen Girl 1 (uncredited) Madeleine Wade as Lisa (uncredited) Katy Perry as Katy (uncredited) Maya Rudolph as Deborah Pink as Pink Will Arnett as Main CMZ Reporter Win Butler as Arcade Fire Derek Mears as Limo Driver Dan Castiglione as Dancer Pharrell Williams as Pharrell Williams Paul Scheer as Wolf Handler T.I. as T.I. Brandon Van Vliet as Award Guest (uncredited) Imogen Poots as Ashley Wednesday Mike Birbiglia as Blonde CMZ Reporter Alison Rich as Crazy Fan Tariq Trotter as The Roots Sarah Silverman as Paula Klein Maxwell Jenkins as Ten-Year Old Owen Carrie Underwood as Carrie Underwood Adam Levine as Adam Levine Amanda Cleghorn as Dancer Simon Cowell as Simon Cowell Akon as Akon Liz Cackowski as Poppies Producer Cameron Brinkman as Roadie (uncredited)

Goro Koyama Foley Artist Zene Baker Additional Editor Matthew Compton Original Music Composer Akiva Schaffer Director, Writer, Producer Judd Apatow Producer Rodney Rothman Producer Allison Jones Casting George H. Anderson Supervising Sound Editor Brandon Trost Director of Photography Craig Alpert Editor Steve R. Nelson Sound Mixer Jorma Taccone Director, Writer, Producer Markus Mentzer First Assistant "A" Camera Andy Samberg Writer, Producer Jon Billington Production Design Ramsey Avery Art Direction