(Music Downloads Not Rated by the ESRB) "She's A Genius" by Jet downloadable single. Please Note: Many songs are available both as singles and as part of a Track Pack, so please carefully consider your purchases before downloading. For all song credits please visit www.guitarhero.com.(Music Downloads Not Rated by the ESRB) "She's A Genius" by Jet downloadable single. Please Note: Many songs are available both as singles and as part of a Track Pack, so please carefully consider your purchases before downloading. For all song credits please visit www.guitarhero.com.