You can listen to the songs with the link I provided.

From ESPN.com:

http://soundcloud.com/pepsianthems/aerosmith-legendary-child

The NFL and Pepsi today announced the expansion of the Pepsi NFL Anthems program with two new songs. 

Lenny Kravitz penned “Like a Jet” for the team he grew up cheering for in New York, and Aerosmith, staunch supporters of the New England Patriots, have released an anthem titled “Legendary Child -- Patriots Anthem.” 

The new tracks are available for free download here, and join originally created anthems by Kid Rock (Detroit Lions), Kelly Clarkson (Dallas Cowboys), Ice Cube (Oakland Raiders) Travie McCoy (New York Giants), as well as a Wiz Khalifa remix of “Black and Yellow” (Pittsburgh Steelers).