What is the song or beat being played when the autobots in transformers come from space in the 2007 Movie?

Like when they come from space in there ball like form.... the song or beat that is played is pretty cool. but i dont know what it is.... and then it plays again when they are flying to the hoover dam in the helicopter and the girl asks Shia what hes doing here and he says "Well i bought a car... and it turned out to be an alie robot... who knew".. lol... but i dont know that beat or song thats played.. what is it