I don't know that you can call me an ABBA fan when I actually really don't like "Dancing Queen" (TRAVESTY, I KNOW!!), but having said that I do like to pull out the Mamma Mia! soundtrack every so often. xD I agree, "Gimme Gimme Gimme" is awesome!! I also like "Knowing Me, Knowing You" a lot, but they cut that one out of the movie I guess ...