Judas of course.
Some other musical highlights of this year were "Rolling in the Deep" - Adele, "**** You" - Cee Lo Green (both of which were actually released in 2010 but are popular now) and sadly, I can't think of ANY other good songs. :/
No.1 Britney Spears - Till The World Ends (2pts)
No.2 Avril Lavigne - What the Hell (2pts)
No.3 Ke$ha - Blow (1pt)
No.4 Lady Gaga - Born This Way (1pt)
No.5 Natalia Kills - Break You Hard (1pt)
No.6 Pink - ****in' Perfect (1pt)
No.7 Britney Spears - Hold It Against Me (1pt)
No.8 Lady Gaga - Judas (1pt)
No.9 Jennifer Lopez - On The Floor (1pt)
No.10 Adele - Someone like you (1pt)