Great thread!
For best harmonization, I'm going to say that
Life wins. The harmonization gives the chorus more power and pizzaz, but still retains the laid back feeling of the song. With
Life, the backup vocals exude just as much emotion as the leading vocals. She's singing like she's deeply reflecting on her life. I love it.
Other good ones -
appears,
BLUE BIRD,
glitter (very smooth!),
CAROLS.
Bad ones.. I'm not sure if it's because of the harmonization, but the songs with grating choruses like
is this LOVE?,
July 1st, and
Because of You are pretty whack. The lalala's in
Moments are just simply unpleasant. I also agree with
RAINBOW, even though it's one of my favorite songs ever.
Oh yeah, I almost forgot
I am... the backup vocals are scary as hell.