What is the music that plays when Shirley is testing out the headphones? There's this song in Code Geass I really like. It plays when Lelouch partially erases Shirley's memories in R1 and when Shirley is testing out the headphones in maybe episode 3 in R2 (at around the 18 minutes mark). Can someone please tell me its name?
According to this reddit thread the song is Masquerade

The vocals, lyrics and composition seem to be all done by Kuroishi Hitomi

It's a great song, it's a shame they seem to have all been taken down off of youtube. If you want a physical copy, Masquerade is the 13th track on this album.