Whats the lupe fiasco song called where he raps in both english and spanish? going back and forth between them

lupe fiasco raps back and forth between spanish and english in this song. my friend heard it on a friends mix but he doesn't know what it is. it may not be lupe fiasco, but he swears that it is. i'm a huge lupe fan and i want to know if it actually is a lupe song or not