What would Tiffany do for a Klondike bar?

Well, we're about to find out, as toofab exclusively reveals that the "I Think We're Alone Now" singer is the latest star to join the ice cream company's Klondike Celebrity Challenge. 

The 41-year-old singer is the second celeb to take part in the competition, following in the footsteps of "Fresh Prince of Bel-Air" star Alfonso Ribeiro, whose video hits YouTube today.

The premise for the online event is simple: Fans come up with challenges for a trio of stars -- and if their idea is chosen, he or she will participate in the same challenge as the celebrity.

Ideas can be submitted on Klondike's Facebook page.

Check out Joel McHale explain the challenge below:

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