There is a television show that I have gotten into. It traces the family tree of famous people. Now Tim McGraw gets to find out who he comes from.

I got into the NBC show Who Do You Think You Are last season. It is one of those shows that leave you thinking, wow... greatness really does come from greatness.We learned about Lisa Kudrow, Matthew Broderick, Emmitt Smith, Brooke Shields and many more. This season has another all-star lineup in store for us.

Last week, Vanessa Williams (TV's Ugly Betty, Desperate Housewives) was able to trace her family tree back to the civil war and find out that one of her grandfathers volunteered to fight for the North. Another grandfather was the first African American elected to the Tennessee legislature.

This week, Tim McGraw will trace his roots back and find out more about where he came from. If you remember, it wasn't until Tim was 11 years old and found his birth certificate that he realized that he was the son of the late Tug McGraw. Now Tim gets to go on the journey to find out who he really is this Friday night.

Other stars we can look forward to this season include Rosie O'Donnell, Steve Buscemi, Kim Cattrall, Gwyneth Paltrow, Ashley Judd and Lionel Richie. Here's a preview of this season's Who Do You Think You Are.