The track "Motherfokker" is a collaboration between the Super Furry Animals and Welsh rappers Goldie Lookin Chain with chorus vocals provided by Cian Ciaran. The two toured together in 2004 and Gruff Rhys has praised the group, stating that "their range of references are insane. They're extremely bright. They're crazy." Rhys has explained that the song is about "an incredibly large aircraft from outer space. Lookin Chain are the aliens and it's about the people of Earth coming together as one". The two groups have performed the track together several times at Super Furry Animals' concerts including the 2004 Reading Festival and a date at the Brixton Academy on 22 September 2005.