Progeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.Most kids with progeria do not live past the age of 13. The disease affects both sexes and all races equally.rogeria, also known as Hutchinson-Gilford progeria syndrome (HGPS), is a rare genetic condition that causes a child's body to age fast.
Pentatonix is made up of Avi Kaplan, a most distinctive bass; Kevin Olusola, the vocal percussionist or the beatboxer; Kirstie Maldonado, the mezzo soprano and only girl in the line-up; Mitch Grassi who does both tenor and counter-tenor voices; and Scott Hoying, the baritone who sings lead most of the time.
They arrange as a group, singing in a circle. Often they will start with beats from Kevin, bass from Avi, then start riffing from there. Song selection is similar, when they are not making originals. A group member feels a song may make a lot of sense and introduces it. They begin riffing on it, a prelude to the arrangement process and if they start feeling the song works, begin to maximize it. A primary goal is to get the fundamental arrangement down so that the feel of the song, Pentatonix style comes through.