some bands don't memorize lyrics for all their songs, so it's understandable that rivers is reading the lyrics for this song. this is probably one of those songs that wasn't rehearsed as much, so the lyrics aren't memorized.
"You wanted arts & crafts, how's this for arts & crafts? Wananananana, Nanananananana"
Thanks, Rivers, for writing a line about how I've lived my life.