Watch A Less Than 'Pitch' Perfect Performance

Glee meets Waiting For Guffman on April 17 when VH1 premieres the hilarious Off Pitch, a new docuseries that follows the members of the Grand River Singers, a community performance group that is still working out the kinks.

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ETonline scored an exclusive clip from the series premiere that introduces you to Marcia ... at the worst possible moment. Check out GRS' rendition of Supercalifragilisticexpialidocious that is anything but.

And if you like what you see, check out the full trailer for Off Pitch below.

Off Pitch premieres April 17 at 10 p.m. on VH1.