Singer Demi Lovato was left red-faced when she forgot the lyrics to her own song Heart Attack during a live Tv performance on Wednesday (10Apr13).

The X Factor judge was singing a rendition of her new track on U.S. Tv show Good Morning America when she fluffed the lyrics, mistakenly going into the second verse before the first.

Ever the professional, Lovato remained unfazed and continued with the performance, simply repeating the second verse.