Camille...what is the difference between falsetto and head tone? In many of the "mix" tutorials like in part 2 and 3, I can still feel chest vibrations quite high up in the exercises. When I think Falsetto, I think Beach Boys, Frankie Valli, etc. Is Neil Young singing in head tones or chest tones?

The contemporary understanding of head voice & falsetto is that falsetto is just a lighter head voice, but they're functionally the same! Sometimes you'll hear the Beach Boys or Franki Valli sound described as "reinforced falsetto". To me, it's all head voice - just different levels of compression (cord closure) and resonance strategies. I don't make a distinction unless it's helpful for an individual student! And as for Neil, he uses both chest and head function, depending on the pitch and intensity. 

Thank you so much, Camille. I'm completely hooked on your lessons, tutorials, and your style of instruction!