While "Pretty Girls" is her weakest first single, it sounds better than most of R2D2 Jean. It could go either way on the charts. I wish they wouldn't have flat out done a Fancy 2.0, but in enough plays, it won't be that noticeable anymore.
The point of this song was to get Britney back to success after the disastrous era, so that's what I'll take the song for and just hope that there will be more melody on her other songs for the album. For now, this will be fun to jam to every once a while this summer.