Lady Gaga scored her first movie role in Machete Kills, and now the singer has loaned a new song to the film's trailer. The track, "Aura," gives the clip with a slithery Western feel as Machete (Danny Trejo) unloads a serving of ass-kicking on the orders of the President (Charlie Sheen). Gaga herself also pops up to give a glimpse of her character's skills with a gun; she is one of several actors to play the character "the Chameleon" in the film.

Lady Gaga Debuts New 'ARTPOP' Songs at iTunes Festival

Machete Kills opens on October 11th; Gaga's upcoming album, ARTPOP, is due November 11th.