David Letterman won't give "Tonight Show" host Jay Leno a head start in the ratings -- he's canceled his vacation next week so the "Late Show" can air new programs.
Leno will return to the "Tonight Show" on March 1st with a star-studded lineup, but Letterman refuses to give him the upper-hand in their long-running feud for ratings.
The two hosts will go head-to-head with their guest lineups. Jamie Foxx, Lindsey Vonn and Sarah Palin will appear on the "Tonight Show," while Letterman snagged Jerry Seinfield and Matt Damon.
Let the ratings war begin!