Day / 21 December 2015, 16:10 GMT
Watch Girlpool join Alex G (Alex Giannascoli) on stage to perform recent single "Brite Boy".
The two acts linked up at SPIN's Year In Music shindig to perform the track; the show also saw Best Coast and Tink take to the stage in Los Angeles.
Girlpool released debut record Before The World Was Big on Wichita over the summer, and Giannascoli dropped second LP Beach Music back in October.
Watch the performance of "Brite Boy" below.