Throughout his career with Dream Theater, LaBrie has lent his voice to many other artists' records as well as tribute albums. In 1991, not long after joining Dream Theater (and before ever appearing on a Dream Theater recording), he sang background vocals on the song "Life in Still Water" on Fates Warning's "Parallels" album. He has appeared on many Trent Gardner releases (including "Leonardo: The Absolute Man" and "Explorer's Club"), as well as appearing on albums by such artists as Shadow Gallery, Tim Donahue and Frameshift.