Mind you, its not true for ALL their songs, but the vast majority.

Well, occasionally, they do a cover of a *good* song (Me and Julio Down by the Schoolyard, Blowin' in the Wind, Hotel California to name a few.) I think their songs are better (more fun) when they take a cheesy song (Country Road, Walking on Sunshine, Mandy, I Get Around come to mind) and make them cheesier.