10/22/2008 AT 12:30 AM EDT
Two-time Dancing With the Stars
champ Julianne Hough was taken by ambulance to Cedars-Sinai Medical Center after Tuesday night's live results show in which she performed a high-energy dance.
Hough, 20, "was experiencing slight stomach pains all day that increased and the doctors thought it was best to have them checked out," her rep, Cindy Guagenti, tells PEOPLE.
Contrary to other reports, Hough "didn't collapse" at the show, Guagenti says.
In fact, Hough was energetic all afternoon and evening.
The budding country singer performed her hit "My Hallelujah Song" while doing choreographed moves with brother Derek and dancer Mark Ballas during a pre-taped segment. The segment, airing later in the season, was taped twice. During the second take a spirited Hough exhorted the crowd to cheer loudly.
Hough also appeared fine during the one-hour telecast. She performed an encore dance with partner Cody Linley: a lively jitterbug that brought the crowd to its feet.
But 40 minutes after the show ended, she was seen getting into an ambulance at CBS Studios in L.A., where Dancing
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