Kellie Goes Back to School

8/30/2007 Stephen L. Betts Kellie Pickler can now refer to herself as a CMA Horizon Award nominee, but can she claim she’s “smarter than a 5th grader”? We’ll find out in November when Kellie takes her place in class as one of several celebrity contestants scheduled to compete on Fox-TV's Are You Smarter Than a 5th Grader? GACTV.com reports that Kellie’s fellow American Idol alum Clay Aiken, talk-show host Regis Philbin, skateboarding legend Tony Hawk, Miss America Lauren Nelson and Billie Bush of Access Hollywood will also participate.   The contestants will compete for a potential million dollar prize for the charity of their choice, facing questions from host Jeff Foxworthy covering subjects taught in grade school, including math, science, art, social studies and geography. The new season of Are You Smarter Than a 5th Grader? premieres Sept. 6 at 8 p.m. (ET). The celebrity edition will air some time during November sweeps.