What do you guys find catchy?

By that, I mean, what tickles your catchy nerve and makes you sing along?

http://www.youtube.com/watch?v=8Q57Sw6t7Gk


http://www.youtube.com/watch?v=iMxMOJYhN4c


http://www.youtube.com/watch?v=lqJDuZIcQ34

Not quite "catchy" per se, but,

http://youtube.com/watch?v=hBW5u-f2pPw

Just a song that reminds some things.

^ That shit was played and danced to at one of our pep rallies.

+ This has a catchy whistle