Could be a fun thread!
Since I don't use iTunes for my music, I'll count number of plays on my iPhone (it gets used in the car every day).
36 Crazyfists - The All Night Lights - 409 Plays
Periphery - Jetpacks Was Yes - 392 Plays
Ninjaspy - Evolution of The Skid - 232 Plays
Fear Factory - Linchpin - 205 Plays
Iron Maiden - The Evil That Men Do - 172 Plays
Might I add, I completely wiped my phone recently, so these plays are nowhere near what they should be.
Coldplay - White Shadows
The Corrs - Breathless
Coldplay - Fix You
Edith Piaf - Non je ne regrette rien
Steven Wilson - Veneno Para las Hadas