I have a couple:

Mom's side:

Mr. Hyden(Forgot the first name) - He started Old Grandad Whiskey

Shannon Miller - Olympic Gold Gymnastic Medalist in 1996 (Also related to Mr. Hyden)

Dad's side:

Jordin Sparks - American Idol winner Season 6

I guess her dad (By marrage) who played for the Dallas Cowboys at some point.