Unlike Kells, Rivers Cuomo and his crew have not been officially assigned the task by FIFA: they're doing it on spec and they're giving it away FOR FREE.
Go to the iTunes Store and search “Weezer Represent” to download “Represent” (which, as Consequence of Sound points out) is mysteriously reminiscent of Cutting Crew's '80s jam “I Just Died in Your Arms.”
BONUS TRACK: “I Just Died in Your Arms”! Party like it's 1986!: