We suspect Grace Potter needed no mics or monitors to project her awesome energy halfway across Grant Park. Watching this amazing powerhouse, with a voice that knows when to pull back and when to soar, it was nearly impossible to move our gaze elsewhere as Potter shimmied, shook and yelped in a sparkly, flapper-style dress. The Nocturnals performed as though they could easily stay up all night, killing it on catchy hits like "Only Love" with heavy drums, seamless harmonies and swinging harmonica.

Lollapalooza 2011: Day 1: Grace Potter and the Nocturals
Discover Time Out original video