Beyonce - Party
Britney - Hold It Against Me
Lady Gaga - The Edge of Glory
Rihanna - Man Down

Let me not give away my top 5 of my Best Of.

Lady Gaga: Marry The Night
Rihanna: Man Down
Beyonce: Love On Top (i really don't know if it's a single but since it has a video..)
Britney: I Wanna Go
Katy Perry: E.T.

Ri - Man Down
Gaga - Edge
Bey - Love in Top
Katy - E.T.
Brit - HIAM

Gaga - The Edge of Glory
Rihanna - We Found Love
Britney - Criminal
Beyonce - Love on Top