Leno's opening week is packed with a stellar line-up including Winter Olympics champions Lindsey Vonn and Shaun White, "American Idol" runner-up Adam Lambert , footballer Brett Favre and former Alska Gov. Sarah Palin.

Ratings for the "Tonight Show" slid after Conan O'Brien took over in June 2009, allowing CBS and David Letterman to take a consistent lead in the battle for late-night network viewers for the first time since 1994.

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BTW: Letterman Fights Leno-Palin with.... Romney

David Letterman 's lineup for next week pits Mitt Romney against Jay Leno and Sarah Palin , tomorrow (Tuesday) night.

Dave also has Leno's pal Jerry Seinfeld and former NBC news guy Tom Brokaw on Wednesday night.