Andy Samberg as Conner Friel

Jorma Taccone as Owen Bouchard

Akiva Schaffer as Lawrence Dunn

Sarah Silverman as Paula Klein

Tim Meadows as Harry Duggins

Maya Rudolph as Deborah

Joan Cusack as Tilly

Imogen Poots as Ashley Wednesday

Chris Redd as Hunter

Edgar Blackmon as Eddie

James Buckley as Sponge

Evan Fine as Ten-Year Old Conner

Maxwell Jenkins as Ten-Year Old Owen

Elliott Smith as Ten-Year Old Lawrence

Questlove as Ahmir-Khalib Thompson

Carrie Underwood as Carrie Underwood

Nas as Nas

Usher as Usher

50 Cent as 50 Cent

Nicholas Azarian as Quirky Kid

Ringo Starr as Ringo Starr

Simon Cowell as Simon Cowell

Adam Levine as Adam Levine

Akon as Akon

Mariah Carey as Mariah Carey

Ashley Moore as Sarah

Danny Strong as Perspective Manipulator

Pink as Pink

Big Boy as Big Boy

DJ Khaled as DJ Khaled

A$AP Rocky as Rakim Mayers

Kevin Nealon as Gary Sikes

Mario López as Mario López

Patricia Schaffer as Upset Homeowner

James Hegarty as Angry Appliance Fan

Walker William Borba as Angry Vlogger

Will Arnett as Main CMZ Reporter

Chelsea Peretti as Brunette CMZ Reporter

Mike Birbiglia as Blonde CMZ Reporter

Eric André as Dreadlocked CMZ Reporter

Bill Hader as Zippy

Joanna Newsom as Steam Punk Doctor

Jonah Goldstein as Steam Punk Doctor

Andre Hyland as Lame Ass Dude

Mike E. Winfield as Hunter's DJ / Hypeman

Danger Mouse as Danger Mouse

RZA as RZA

Chester Tam as Club DJ

T.I. as T.I.

Pharrell Williams as Pharrell Williams

Seal as Seal

Paul Scheer as Wolf Handler

Adrien Finkel as Angry Fan

Christine Krumme as Angry Fan

Ben Newell as Angry Fan

Joy Lanceta as Angry Fan

Walter Jones as Angry Fan

Keith Love as Angry Fan

Alison Sluiter as Angry Fan

Isis Brown as Angry Fan

Jimmy Fallon as Jimmy Fallon

Win Butler as Arcade Fire

Régine Chassagne as Arcade Fire

Steve Higgins as Steve Higgins

Derek Mears as Limo Driver

Alison Rich as Crazy Fan

Martin Sheen as Martin Sheen

Will Forte as Bagpipe Player

Marielle Heller as Documentary Crew Member

Snoop Dogg as Snoop Dogg

Ithamar Enriquez as Stage Manager

Liz Cackowski as Poppies Producer

'Weird Al' Yankovic as Hammerleg Lead Singer

Michael Bolton as Michael Bolton

Kirk Douglas as The Roots

James 'Kamal' Gray as The Roots

Damon Bryson as The Roots

Mark Kelley as The Roots

James Poyser as The Roots

Ian Hendrickson-Smith as The Roots

Tariq Trotter as The Roots

Dave Guy as The Roots

Manwé Sauls-Addison as Dancer

Leah Adler as Dancer

Carly Anderson as Dancer

Carlena Britch as Dancer

Dan Castiglione as Dancer

Amanda Cleghorn as Dancer

Krystal Ellsworth as Dancer

Brandon Henschel as Dancer

Calvit Hodge as Dancer

Caitlynn Lawson as Dancer

Alicia Mazepa as Dancer

Allie Meixner as Dancer

Kyle R. Robinson as Dancer

Robert Roldan as Dancer

Stephanie Scull as Dancer

Ashley Seldon as Dancer

Nikeva Stapleton as Dancer

Chelsea Traille as Dancer

Nathaniel Trasoras as Dancer

C. J. Tyson as Dancer

Emma Stone as Claudia Cantrell (uncredited)

Justin Timberlake as Tyrus Quash (uncredited)

Cameron Brinkman as Roadie (uncredited)

Jasmine Hester as Conner's Entourage (uncredited)

Sandra Rosko as Concert Fan (uncredited)

Lili Sepe as Teen Girl 1 (uncredited)

Brandon Van Vliet as Award Guest (uncredited)

Madeleine Wade as Lisa (uncredited)

Katy Perry as Katy (uncredited)

Dave Franco as Co-actor in the movie "Cube Theorem" (uncredited)