Barbie Girl was the most commonly known song of them. Unfortunately, I think that is why the group ultimately didn't last. They had a few other good songs in their album, which were definitely better than Dr. Jones and Barbie Girl. I don't quite remember the song name but I think something about Sunshine...
EDIT: Good Morning Sunshine I think was it.
'Cause you give me something / That makes me scared, alright / This could be nothing / But I'm willing to give it a try / Please give me something
'Cause someday I might call you from my heart