Gossip Girl

Michelle Trachtenberg, who I will always fondly remember as Dawn, from Buffy The Vampire Slayer, also appeared in Gossip Girl after BTVS ended.

I don't remember exactly what episode this was from, but Trachtenberg obviously went BF on Gossip Girl from time to time.

I was never really a big fan of this series, but at least it had its stars go sans shoes.