Watch Lennon & Maisy Sweetly Cover Charli XCX's "Boom Clap"

The young 'Nashville' singers posted their first YouTube video since March 2014.

Sisters Lennon and Maisy Stella deliver beautifully harmonized songs as Maddie and Daphne Conrad on Nashville, but the singers also grace YouTube with their soulful duets as Lennon & Maisy.

Their latest song is a cover of Charli XCX's "Boom Clap" from The Fault in Our Stars soundtrack, and it really shows off the girls' musical talent. It's the first video Lennon & Maisy have posted on their YouTube account since March 2014. Listen to their lovely voices below.

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