As they say, if this don't light your fire, your wood's wet. Crank
up your volume and listen to I L-O-V-E U. 6 amazingly skilled vocalists
came together to form the a capella group Take 6 in the 80s (yes, there
was such a time). There are only vocal sounds on this song - no instruments
at all. Listen to each part and notice how skilled and difficult each
separate thing is to do. Harmonies, lead, licks, fills, percussion, performance
conception, musical energy - all amazing and ground breaking at the time.
This is HARD music and it doesn't suffer from being all vocals, the
voice being a comparatively imprecise instrument.
Take 6 - So Much to Say