In the chant part for BMUBMD, the backing vocals go up very, very high.
F5 - Under A Glass Moon
Higher than that..
F#5 - Learning To Live
G5 - Octavarium
Yes, it's higher than that...
G#5 - Build Me Up, Break Me Down
Insanely high! But wait...
A5 - Build Me Up, Break Me Down
Yep. The backing vocals in BMUBMD are mainly G#5 (already a record), but they reach an astounding A5, a whole step higher than the previous highest note, from Octavarium. The only time I've heard James LaBrie reach A5 before is on the bootleg recording of DT's cover of Number of the Beast.
He's 48 years old, but he's still got it.