There are at least two artists named Machine Girl:

1) Machine Girl is an electronic producer based in Brooklyn, NY. Their discography consists of at least 3 EPs, one single, and the underground hit LP WLFGIRL, which was released in February 2014 through London’s Dred Collective. More recently, their sound has morphed from a straightfoward hardcore breaks style to a more aggressive digital hardcore-influenced ones with records such as ...BECAUSE I'M YOUNG ARROGANT AND HATE EVERYTHING YOU STAND FOR and The Ugly Art.

2) Machine Girl is the result of Line 47 (Scott Weber) and Enduser (Lynn Standafer) combining to create a hardcore idm hybrid. Taking from many different genres, Machine Girl is the ultimate mashup of ragga, idm, noise, gabba, and speedcore.
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Artist biography from last.fm