How to get songs back on iTunes?

I bought 6 songs on my new iphone today, and then restored it from a past back up before transferring the songs to my computer. Now, they disappeared and i can't find them. They still show up on my account's purchase history, but when i go to the itunes store, it still says they're $0.99. I'm afraid to click on it cause i don't want to be charged again.

Does anyone know how i can get them back?

You should try this site http://itunes.gamerbutler.com, haven't check myself, but my youngest brother told me that it was working. Hope this help! (^_^)