Celebrity·Posted on Feb 5, 2015Lennon And Maisy Did A Perfect Cover Of Charli XCX's "Boom Clap"Best sister duo right now imho.by Lauren YapalaterBuzzFeed StaffLinkFacebookPinterestTwitterMail Just listen to Lennon and Maisy being their perfect wonderful selves while covering "Boom Clap." It's so good. View this video on YouTube youtube.com Teen and tween queens! Tap to play GIF Tap to play GIF