So I was at a party last night and this girl came up to me and told me I looked like some singer.. SO we chatted blah blah then went about and did our own thing. We would see each other throughout the party and make good eye contact and smile.. Anyway, I didnt get too much time to progress. I have seen her before and we have many mutual friends so it is not hard at all to find her on facebook.. What would be the best approach to re-open this?

You could message her and ask her to hang out with you and your friends next time you guys are doing something... or if you don't want to wait, get your friends together to do something and invite her. Make sure whatever you do, its really fun. You could also throw a party and invite her... hosting parties gives you high value. Either way you just need to isolate her from the group at some point... maybe you won't get an opportunity the first time you guys hang out but the sooner the better. I'd be indirect until you at least kiss close her but then again, I'm far from being the most experienced guy on here haha

thanks.. was thinking about adding her.. Does it come off as creepy to add someone you barely know on facebook?

depends... but you don't have much of a chance if you don't do anything right?

If you already know her even if you only talked to her for awhile its not creepy to add her on facebook shes a mutual friend. Just do it!

Or you can just message her without adding. She'll do that herself.