Question about a song on a commercial?

Ive been watching tv alot lately and ive happened to see the olympic trials commercial with michael phelps in it and it plays i song i really wanna know.. anyone know what it is? I dont really know what the lyrics are...all i know is they say sacrifice in it..and i looked up songs named sacrifice and all i got was creed..and creed isnt the band...plz help me find the song!!