Technical help, please

OK, so I am a little technically challenged sometimes. I have an Ipod, and know how to do two things: upload songs from CDs in my possession, and buy songs from itunes.com.

Now how else can I put songs on there? Specifically, if there is a song I like but can't find on itunes, can I get it another way?

I am loving Katy Perry's Waking Up in Vegas and it would be awesome to run to.

Ashley, do you think Big Kid can give me some help?