Catchy songs that get stuck in your head

[sugarbasil]

What are some ridiculously catchy songs that get stuck in your head? Usually they're songs that you hate, too.

A lot of people complain that Hillary Duff and Kelly Clarkson often get stuck in their head. Usually I get Backstreet Boys or the Pretty Woman song stuck in my head. Sometimes Namie's 'wishing on the same star' and Ayu's 'SURREAL.' In Japan everyone was singing that Avril song, 'hey hey you you, I don't like your girlfriend.' I hated it. >_< Recently, though, I've been having a really hard time getting that Rick Ashley 'Never gonna give you up' song out of my head because I've been RickRolled so many times this week. >_<

What about you?