Paris Hilton is a promotion machine

"We made a huge splash out there, and I just continued talking about how great it was and how fun it was," she said.

Hilton was one of eight executive producers for the movie, though she acknowledged she was a bit shaky on what that meant.

"I'm not sure what a producer does, but — I don't know, help get cool people in the cast," she said.

Hilton's manager and schedule overseer, Jason Moore, said in a deposition that she hasn't taken a day off "in years," with workdays often beginning at 6 a.m. or earlier for hair and makeup.

Changing a single item on that schedule is like "controlling chaos," so last-minute adjustments sought by movie investors weren't possible, Moore said. He cited long-scheduled business trips to places like Japan, Ireland and Australia, along with Hilton's work on "The Simple Life" reality TV show, which often left her without reliable access to phone service while she worked 18-hour days.

Court documents in the case show what was keeping her busy, documenting that she earned more than $22 million in 2006 and 2007 from contracts that included heavy promotional work, including Motorola cell phones in Japan, her Parlux line of fragrances, cosmetics and accessories, and promotional nightclub appearances.

At one point, the "Pledge This!" producers suggested that Hilton could appear on Leno's "Tonight Show," but Moore said that was a nonstarter.

Moore said Hilton vastly prefers Letterman, though she said she once got angry with him because he made fun of the 2007 incident in which she spent 23 days in jail for violating probation on alcohol-related reckless driving charges.

"I told his people that I would never do the show again, but then he apologized and called me and sent me flowers and was very sweet, and he was on the air a lot at nighttime like asking me to come back on the show, and we made up," Hilton said.

Moore said Hilton doesn't do Leno because he is Letterman's competition and because during a previous appearance he "didn't follow particular guidelines with regard to why we were there and promoting. We would never do Leno."