Can my eyes and ears - deceive me - not one of the principal actors actually sung???
What a pity - I would like to have known who dubbed the blonde guy's voice, it sounded great! (lead vocalist, I think).
"Live long and prosper"
None of the actors used their real voices in this film. The singers on the recordings were Joel Silbersher, Bram Presser, Simon Cleary, Christian Argenti and Julian Argenti. (You may recognize the Argenti name - they formed Invertigo several years ago.)
Go take a step outside - see what's shaking in the real world.