Uh-oh… KT Tunstall forgets words live on stage to her BIGGEST hit

Forgetting words to a song is every performers worst nightmare – let alone live, on stage, at your OWN concert. 

But that's what happened to Scottish singer KT Tunstall in her latest performance. 

The 40 year-old was building up to sing her biggest hit, Black Horse and the Cherry Tree, when the lyrics completely stunned her. 

She admitted that she forgot her own lyrics but what followed is nothing short of hilarious. 

What the video here: