Slow down guys... Everyone loves Avi, but the real unsung hero is Kevin. If you took him out, it would make the biggest impact. Though both of them - the bass and drums - are tremendously talented.
+Taoist Elf I really think that nobody's hero, everybody loves to avi by her voice, and because it does not sing as well as kirstin, mitch or scott, avi is the popular pentatonix, as well as nick carter in the backstreet boys or justin timberlake in nysnc.
I honestly love their tours with their choreographs, it gives the audience more hype and energy. Not complaining on their 2015 tour though, I get it that they removed their movements on stage to avoid stress and exhaustion.