| Name | Character | Episodes |
|---|---|---|
| 'Weird Al' Yankovic | Self | 11 |
| Jay Levey | Self | 11 |
| Ozzy Osbourne | Self | 2 |
| Céline Dion | Self | 2 |
| Snoop Dogg | Self | 1 |
| Justin Timberlake | Self | 1 |
| George Lucas | Self | 1 |
| Paul McCartney | Self | 1 |
| Avril Lavigne | Self | 1 |
| Vince Neil | Self | 1 |
| Drew Carey | Self | 1 |
| Sting | Self (archive footage) | 1 |
| Gilbert Gottfried | Self | 1 |
| Paula Abdul | Self | 1 |
| Coolio | Self | 1 |
| Jessica Simpson | Self - Interviewee (archive footage) | 1 |
| Cher | Self | 1 |
| Billy West | Self | 1 |
| Boy George | Self | 1 |
| John Kricfalusi | Self | 1 |
| Ben Stein | Self | 1 |
| Michael Stipe | Self | 1 |
| Kevin Federline | Self - Interviewee (archive footage) | 1 |
| John Mellencamp | Self | 1 |