Hello Its so encouraging to know that I'm not the only one with this problem. It isn't nerves or stage fright because its o.k. when i'm infront of a proper audience but down the local pub its sometimes very worrying how often it happens. The ones that stay with me are the ones I've known for years or the ones I can see in my head - like a film. I din't set out to learn them either, they just attached themselves to me and stayed like good friends. If I'm really in a jam then jotting down just the first few words of each verse just before I get up to sing helps. lots of love