| Person | Type | Job | Role(s) | Episodes |
|---|---|---|---|---|
 Abby Gennet | Cast | Self - Host | 51 | |
 André 3000 | Cast | Actor | Self (archive footage) | 1 |
 Anthony Kiedis | Cast | Actor | Self (archive footage) | 1 |
 Ashley Roberts | Cast | Actress | Self (archive footage) | 1 |
 Beyoncé | Cast | Actress | Self | 1 |
 Big Boi | Cast | Actor | Self (archive footage) | 1 |
 Carmit Bachar | Cast | Actress | Self (archive footage) | 1 |
 Chad Smith | Cast | Actor | Self (archive footage) | 1 |
 Christina Aguilera | Cast | Actress | Self (archive footage) | 1 |
 Emily Erwin | Cast | Actress | Self (archive footage) | 1 |
 Fergie | Cast | Actress | Self (archive footage) | 1 |
 Flea | Cast | Actor | Self (archive footage) | 1 |
 Jessica Simpson | Cast | Actress | Self (archive footage) | 1 |
 Jessica Sutta | Cast | Actress | Self (archive footage) | 1 |
 John Frusciante | Cast | Actor | Self (archive footage) | 1 |
 Josh Duhamel | Cast | Actor | 1 | |
 Justin Timberlake | Cast | Actor | Self (archive footage) | 1 |
 Martie Maguire | Cast | Actress | Self (archive footage) | 1 |
 Matt Pinfield | Cast | Actor | Self - Host | 50 |
 Natalie Maines | Cast | Actress | Self (archive footage) | 1 |
 Nelly Furtado | Cast | Actress | Self (archive footage) | 1 |
 Nick Lachey | Cast | Actor | Self (archive footage) | 1 |
 Nicole Scherzinger | Cast | Actress | Self (archive footage) | 1 |
 Shakira | Cast | Actress | 1 | |
 Snoop Dogg | Cast | Actor | 1 | |
 Timbaland | Cast | Actor | Self (archive footage) | 1 |
 Alison Becker | Cast | Actress | Self - Host | 153 |
 Amy Lee | Cast | Actress | 1 | |
 Chad Kroeger | Cast | Actor | Self (archive footage) | 1 |
 Ciara | Cast | Actress | 1 | |
 Daniel Adair | Cast | Actor | Self (archive footage) | 1 |
 Gary Lightbody | Cast | Actor | Self (archive footage) | 1 |
 John Cena | Cast | Actor | 1 | |
John LeCompt | Cast | Actor | Self (archive footage) | 1 |
 John Legend | Cast | Actor | 1 | |
 Joss Stone | Cast | Actress | 1 | |
 Justin Furstenfeld | Cast | Actor | Self (archive footage) | 1 |
 Katharine McPhee | Cast | Actress | 1 | |
 Kelly Clarkson | Cast | Actress | 1 | |
 Kimberly Wyatt | Cast | Actress | Self (archive footage) | 1 |
Mat Kearney | Cast | 1 | ||
 Melody Thornton | Cast | Actress | Self (archive footage) | 1 |
 Mike Kroeger | Cast | Actor | Self (archive footage) | 1 |
 Paul Wall | Cast | Actor | Self (archive footage) | 1 |
 Pharrell Williams | Cast | Actor | 1 | |
 Rachel Perry | Cast | Actress | 1 | |
 Regina Spektor | Cast | Actress | 1 | |
 Rocky Gray | Cast | Actor | Self (archive footage) | 1 |
 Ryan Peake | Cast | Actor | Self (archive footage) | 1 |
Terry Balsamo | Cast | Actor | Self (archive footage) | 1 |
 Tyson Ritter | Cast | Actor | Self | 1 |
William Boyd | Cast | Actor | Self (archive footage) | 1 |
Damian Kulash | Cast | Self (archive footage) | 1 | |
 David Archuleta | Cast | Actor | 1 | |
 Jordin Sparks | Cast | Actress | 1 | |
 Katy Perry | Cast | Actress | 1 | |
 Nick Wheeler | Cast | Actor | 1 | |
 Ryan Ross | Cast | Actor | Self (archive footage) | 1 |
 Nathan Larkin-Connolly | Cast | Actor | Self (archive footage) | 1 |
Shannon Coffey | Cast | Self - Host | 47 | |
Bradford How | Cast | 337 | ||
 R.L. Stine | Cast | Actor | 1 | |
 Danger Mouse | Cast | Actor | Self (archive footage) | 1 |
 Brooke Hogan | Cast | Actress | Self (archive footage) | 1 |
 Cee Lo Green | Cast | Actor | Self (archive footage) | 1 |
 David Cook | Cast | Actor | 2 | |
Timothy Nordwind | Cast | Actor | Self (archive footage) | 1 |
Dan Konopka | Cast | Self (archive footage) | 1 | |
Andy Ross | Cast | Self (archive footage) | 1 | |
 Bradford How | Cast | Self - Host | 151 | |
 James Blunt | Cast | Actor | 1 | |
 Brendon Urie | Cast | Actor | Self (archive footage) | 1 |
Matt Noveskey | Cast | Self (archive footage) | 1 | |
Ryan Delahoussaye | Cast | Self (archive footage) | 1 | |
C. B. Hudson | Cast | Self (archive footage) | 1 | |
Isaac Slade | Cast | Self (archive footage) | 1 | |
Chris Gaylor | Cast | Actor | Self (archive footage) | 1 |
Mike Kennerty | Cast | Actor | Self (archive footage) | 1 |
Paul Wilson | Cast | Self (archive footage) | 1 | |
Jonny Quinn | Cast | Self (archive footage) | 1 | |
 Spencer Smith | Cast | Actor | Self (archive footage) | 1 |
| Person | Type | Job | Role(s) | Episodes |
