Amanda,
Doing a search for "music downloads" on "Google" will find a lot of information for you.
Staying appropriate with forum guidelines....Here are a couple of legal sites:
http://www.apple.com/itunes/
http://musicdownloads.walmart.com/catalog/servlet/MainServlet
Hope this helps.
Grif
I would like to find a site that I can download music from. Can you help me?

Chowhound
Comic Vine
GameFAQs
GameSpot
Giant Bomb
TechRepublic