I get addicted to songs. List of songs I've been addicted to:
Disturbed - Down with the Sickness (while ago but lasted long time)
Manson - New Shit
Green Day - Just Drop Dead
System of a Down - I-E-A-I-A-I-O
Monster Magnet - Space Lord
Rob Zombie/Drowning Pool - Man Without Fear
Nirvana - Rape Me
Currently: Soil - Pride