Idina Menzel's On Stage Wardrobe Malfunction

"What? My boob's coming out?" asked Idina Menzel.

Menzel suffered a wardrobe malfunction in full view of adoring her audience.

YouTube videos show the Frozen star performing in a low-cut top at Radio City Music Hall in New York City when someone yelled out that her bra was riding up.

An assistant rushed on stage to the rescue, and Menzel found humor in the situation. Her career has never been hotter.  John Travolta infamously flubbed her name at the Oscars, calling her "Adele Dazeem".

Just like on Oscar night, Menzel carried on like a trooper.