See the American Idol contestants (Siobhan! Casey!) and the stars (Demi Lovato! Josh Holloway!) they resemble
Credit: Vince Bucci/PictureGroup; Orlando Garcia/JPI
Updated: Tuesday Apr 20, 2010 | 11:00 AM EDT
More from PEOPLE
See More News
Skipping gorilla juiceheads for the A-list, the Jersey Shore star makes the rounds
1 of 8
The quirky singer, who loves vintage dresses and hitting high notes, could stand in for Disney star Demi Lovato on Sonny with a Chance.
Copyright © 2014 Time Inc. All rights reserved. Reproduction in whole or in part without permission is prohibited.
In partnership with AOL