You never know what song is going to stick. My kids might be exposed to dozens of new songs each week, but only a select few become favourites that they memorize and sing ad nauseam.
For the longest time Michelle was in love with K-OS' "Sunday Morning", and then the kids really got into Phil Collins' "In The Air Tonight" and Linkin Park's "Bleed It Out". These days, they're all about Ozzy, Michelle in particular.
Her Ozzy of choice is "Crazy Train". She does the "Aye, Aye, Aye, Aye, Aye, Aye" in the beginning and really belts out the "I'm going off the rails on a crazy train" refrain. She just loves to sing "Crazy Train", and that's perfectly fine with me.