In a last-minute scheduling change, American Idol‘s top 10 males semifinalists will perform on tonight’s live telecast, instead of the season 9 female contestants, “due to medical issues that would prevent Crystal Bowersox from performing,” according to a Fox spokesperson who declined to say what specifically is ailing the guitar-playing front-runner. Check back at this URL for more details as they come in. Related: ‘American Idol’ Power List: We’re down to 20! Who’s your favorite?

Image credit: Michael Becker/Fox