What app can I use to cut music?

I have to make up a hip hop dance and I need to cut different songs and put them together then put them on a CD the app needs to be free and for a toshiba laptop but if you don't know any for the laptop then i have an iphone 5

Audicty is an open-source (free) program! This program has lots of options tto edit music.
http://audacity.sourceforge.net/download/