The girls are back in town and this week's 3x3 features three -- well, technically four -- rockin' females. First up is Cortney Tidwell, who brought her southern electronica vibe over to impress the Brits at her performance in London's Luminaire. Then we head over to Toronto to get a dose of Canadian twins Tegan and Sara, who rev up an adoring crowd with their infectious hooks and heart-on-sleeve folk-punk. We wind things down with a whimsical performance from Imogen Heap, who layers ambient electronica with indie rock sensibilities for a London crowd.


Want more 3x3? We've got 63 different performances for you to watch.