"Everybody's Trying to Be My Baby"

A few times over the past month or two, I've been paying special attention to the vocal on "Everybody's Trying to Be My Baby" while listening to Beatles for Sale.  According to Mark Lewisohn's The Complete Beatles Recording Sessions, the vocal is treated with STEED (single tape echo and echo delay), so it's a bit difficult to be sure, but I think that the vocal is doubled-tracked for all of the "Ev'rybody's tryin' to be my baby" lines.  If that's the case, it's something of a representation of the "ev'rybody" since it's not just one voice singing there, but two.