Lindsey Stirling
Lindsey Stirling (born September 21, 1986) is an American violinist, dancer, performance artist, and composer. She presents choreographed violin performances, both live and in music videos found on her YouTube channel, Lindseystomp, which she introduced in 2007. In 2010, Stirling was a quarter-finalist on America's Got Talent season five, where she was known as the Hip-hop Violinist.
source: Wikipedia