Sit yourself down,take a seat - Pentatonix's Grammys performance is about to blow you absent. After taking domestic their third Grammy win, the a cappella group gave a sweet tribute to The Jackson 5 when they performed their classic hit "ABC" on stage. Not only did they display off their impeccable (perfect, flawless) vocals, and but as always,they also managed to add their own signature flare to the song.
Source: popsugar.com