FOX knows marketing.

Looking to capitalize on a pair of its hit reality shows, the network has asked two American Idol finalists to appear on a charity version of the quiz show Are You Smarter Than a Fifth Grader?

In November, host Jeff Foxworthy will quiz Clay Aiken and Kellie Pickler on their knowledge of basic geography, history, science, math and English. It should be fun.

Billy Bush, Regis Philbin and Tony Hawk are also scheduled to appear.

Matt Richenthal is the Editor in Chief of TV Fanatic. Follow him on Twitter and on Google+.