The topic is Barbershop music, kinda like rap and stuff like that. 
I think Barbershop music is so beautiful.  The harmonies are so pretty!
Jimmy Fallon does them on his show every once in a while, Have you ever seen any of them?
ha ha!!  Oh I get you that kind  of Barbershop music.  I am think the acapella kind!
haha yes exactly, with the guys wearing the pinstripe suits.
Yes, a barbershop quartet sung by four singers each with their own vocal part!  I am sure the Jimmy Fallon version is quite funny though!
Yeah I think it takes a lot of practice between the 4 people to make it sound awesome!
Oh I am sure it does. They each have their own role.  Including one of my favorite which is the baritone.
Hes the lowest vocal part right? Yes that is my favorite as well. 
yes the baritone is the lowest part.  another part would be the tenor which is one of the higher parts.