For myself and for a lot of fighters, music plays a major role about the way I perform when I'm training in the gym or on the ring.
Some of the fighters in the UFC, in Strikeforce or in any other fighting organization choose carefully their entrance song. Some of them prefer to pick a song that represents their country, for example, Michael Bisping make its entrance into the octagon with: Song 2 by Blur because that song represents very well United Kingdom. Some opt instead for a more humorous approach like the fighter Yoshihiro Akiyama with the song : Time To Say Goodbye (Con Te Partiro) by Andrea Bocelli). Finally, some of them select a more upbeat music, rock, rap, metal like Mr. Brock Lesnar with the song Enter Sandman by Metallica.
Anyway, I hope you'll find some great pump-up songs in all those walkout music that UFC fighters choose when they're fighting in the octagon.