NEW YORK - Ashlee Simpson (news)'s Orange Bowl (news - web sites) halftime performance was a lemon, according to the 72,000-plus Miami crowd. The 20-year-old singer received a discernible chorus of boos following a performance of her song "La La."

"You make me wanna scream," she sang before the audience jeered.

Simpson was among a trio of halftime performers Tuesday night in a game that saw Southern California overwhelm Oklahoma 55-19. The camera cut away from her face as the booing began.

The negative vocal reaction came months after Simpson's performance on NBC's "Saturday Night Live," which revealed she used background vocal tracks. The mishap was later attributed to acid reflux.

However, the Orange Bowl crowd did have a reason to cheer. The Walt Disney Co. gave a theme park ticket to every fan. The giveaway, a promotion that could cost as much as $4.3 million if all the tickets are used, is in honor of the 50th anniversary of its Disneyland park in California.

The second season of Simpson's unscripted MTV reality show, "The Ashlee Simpson Show," premieres Jan. 26 and will capture the "SNL" appearance and preparation for her first nationwide tour, which begins Feb. 18 at Los Angeles' Universal Amphitheatre.