I think it's clear that in the Diana-free instrumental in the other thread that you only hear Mary and Flo, that they sing "youuuuuuuuuuuu, I need you babe" as their repeating lyric throughout the song.

But.

In this live performance, they REALLY sound like they're singing "doodoodoo Doo doo doo, I need you babe"

Did they change the lyrics there? It happens like twenty times in this video!