Last month, we reported that Billboard was offering fans a unique opportunity via "Mashup Mondays", where fans got to vote for a song their favorite artists would cover. Well, it has just been revealed that the Wonder Girls' cover of B.o.B & Bruno Mars' "Nothin' on you" was voted the best cover of 2011! The girls took a whopping 65% of all the votes and beat out Greyson Chance, Hanson, James Blunt, Grace Potter, and many others! Congratulations to the girls on this noteworthy achievement! Source & Image : Billboard