Pentatonix! So, I have to say this, the first time I heard Pentatonix was on the Sing Off. They were my favorite of that season & I have been in love with them from the first note to now and forever more! 'Can't Hold Us' is one of my favorite videos they've done just because I just enjoy the music and the different 'groups' they sign in throughout the video. But it's just all around a great, fun some to listen to. So, hit that play button!