In 2000, Lee sang on two of former Evanescence keyboardist David Hodges' songs: "Breathe" ("The Summit Church: Summit Worship") and the unreleased "Fall Into You". She performed backup vocals for "Missing You", a song on Big Dismal's 2003 debut album "Believe", and sang backup vocals on two songs with supergroup The Damning Well, though her vocals were taken off the final release due to record label issues. Lee later performed a duet with her then-boyfriend Shaun Morgan on the track "Broken" for Seether's 2004 album "Disclaimer II". The song is in the soundtrack for the 2004 film "The Punisher".