Best friends Selena Gomez and Demi Lovato are both had at work on their Disney Channel shows. Selena's busy filming her second season of Wizards Of Waverly Place and Demi recently started shooting Sonny With A Chance, which airs this spring. The girls both spilled that they would love to film guest spots on each other's shows! "We're working on [a cameo]," Selena said. "We'd love to have Demi on [Wizards] and I'd love to be a guest star on her show."

If you could guest star on any show, which would it be?

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