Have you ever noticed how much Adam sings like Kalan Porter? I always notice this on Starlight. I mean, Kalan is a baritone and Adam's a tenor, but it's almost the same singing style. Maybe that's what "trained voices" tend to sound like?
(I like Kalan better than Adam, I think he puts more into the lyrics/emotional connection thing. I'm just talking more about the basic singing style.)
ETA: Thanks, missaddicted. I'll dive into that as soon as the concert is over. The sound is amazing. This is actually really making me look forward to this concert now.
Btw, The audience sounds like it's about 90% female. On the Long Island of Honolulu, I mean.