Everyone who attended last night's Vitamin Water Uncapped concert in Portland, Ore. was treated to something extra special during Kendrick Lamar's set. He was joined by Bethany Cosentino, aka the frontwoman of co-headlining band Best Coast. Together, they performed stirring Section.80 track "No Make-Up (Her Vice)" with Cosentino filling in for Colin Munroe. You can watch it above.

[via XclusivesZone]