They have a "theme song" for the X Games every year, The Catalyst is probably it for this year. That means it'll be the background music in a lot of their montage videos, music leading in/out of commercials, intro music for each broadcast, stuff like that...you probably won't hear the entire song at any single point, but they'll use different chunks of it at different times.
*Edit* Actually, I forgot they've been using that "X Games Without Frontiers" song as their official theme music the last few years, so The Catalyst probably won't replace it. I'm sure it'll be used more than once during the entire X Games though.