Lennon and Maisy from ABC’s “Nashville” Cover “Boom Clap” [VIDEO]

You may have seen 15-year-old Lennon Stella and 11-year-old Maisy Stella on the ABC show "Nashville".  They play sisters Maddie and Daphne on that show but they're also sisters in real life, who got their start covering songs on YouTube.

Their first cover has been viewed more than 25 million times since 2012. Their latest is a  stripped-down cover of the pop song "Boom Clap" by Charli XCX.