I just notice they both have schoolgirl backup dancers.

What do you think of them (Gwen and Fergie)?

Gwen seems all over the place. It's not dance, and it's not hip hop... I like the sound on some of her songs, but they actually get annoying. I think it might be the way she sings.

Fergie's singing is easier to dance to, but the songs are getting predictable.

All their songs have the same formula. You hate it the first time you hear it, then you get addicted to it.