Also don't know what constitutes a more 'singles' style. Barbie always looks like she shops at Old Navy and Frederick's of Hollywood anyway.
Probably the new skank look teenage girls have nowadays. Tight, no-back-pocket jeans (i.e. all ass), tight shirts to show off their boobs with no-padded bras, maybe some action feature so she can play with her hair and look innocent as if she has no clue every guy is staring at her. Mattel is probably copying that other doll brand, Bratz or something, which seems to give the message to little girls that it's ok to dress like a slut, that the whole slut lifestyle is something to strive for. Yeah, I know, it's not any different than Barbie's original message that the glamourous lifestyle is something strive for, but I've always hated Barbies anyway, for that very reason. If I had a daughter, she wouldn't be playing with any dolls that teach her to be fake in life. That's just my opinion.