Some of the other contestants include Tiffany, Maureen McCormick ("The Brady Bunch"), Dustin Diamond (aka Screech) and Ross the Intern from "The Tonight Show."
"Celebrity Fit Club: Men Vs. Women" premieres Sunday, April 22nd at 9 p.m. on VH1, but you can catch a sneak preview of the premiere at www.vh1.com.
By the way, Kimberley's new CD, "Based on a True Story" drops May 1st...