I see I'm late but I've decided to list my least faves in each album anyway.
Debut: Love Takes Time

Emotions: You're So Cold
Music Box: Hero
Daydream: Probably When I Saw You bc Slipping Away deserved its spot even though it's not that bad.
Butterfly: Fly Away
Rainbow: Did I Do That?
Glitter: Last Night a DJ Saved My Life (it drags forever, ain't nobody got time for that)
Charmbracelet: Irresistible
TEOM: To The Floor
E=MC˛: the whole album except 4 tracks(TMB, Side Effects, FTR and IBLULT)
Memoirs: Up Out My Face(standard and reprise) can go
MIAM: Supernatural ft. Melodyne and anything after Camouflage