Gregory Everett Greg Proops is an American actor, stand-up comedian and television host. He is widely known for his work as an improvisational comedian on the UK and U.S. versions of Whose Line Is It Anyway?. He also performed on Drew Carey's Green Screen Show and played Max Madigan on the Nickelodeon sitcom True Jackson, VP.
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Buy Discography: 
| Play | Soundtrack | Movie/Serie | Type | Buy song | |
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| Making Christmas | The Nightmare Before Christmas | performer |
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| Making Christmas | One Hit Wonderland | performer |
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| This Is Halloween | The Nightmare Before Christmas | performer |
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| Town Meeting Song | The Nightmare Before Christmas | performer |
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| Welcome | Sing Along Songs: Brother Bear - On My Way | performer |
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