Singles are pretty high profile/useless to recommend for top songs lists (I honestly dislike any website that does list singles in top lists; sure they may be fantastic and all, but I'd rather expand my horizons).
It was a really R&B centric year for me, so I don't have my usual expansive palette, but anyway; my recommendations from 2010:
Bruno Mars - Who is?
Rihanna - Love the way you lie (Pt. II) (Piano Version).
Bookmarks