Mamma Mia/ABBA Question (The stage musical, not the movie)?

Question

Does anyone know the song that they start singing after the curtain call. It's not from the show, I think it is another ABBA song?

Answer 1

For the curtain call, they do a reprise of Mamma Mia, then Dancing Queen, then Waterloo. I think the one you are thinking of is Waterloo.