at least according to the Bring it On DVD I just watched.

The DVD has this special feature where you can watch the movie and have Popup Video like trivia appear during the movie.

One of the trivia boxes as a list of people that were cheerleaders including Dwight Eisenhower, Jimmy Stewart, Kirk Douglas, Samuel L. Jackson, Teri Hatcher, Reba McIntyre, Cybil Shepherd, Raquel Welch, Cheryl Ladd, Madonna, Cameron Diaz, Calista Flockheart and Meryl Streep