I remember hearing both growing up (For reference this body was born in 1980). But mostly it was singlet-I've only heard singleton used maybe once or twice.

These are fascinating, Sneak, and put so much into perspective. May be multiple for going on...shit 12 years now, but I still feel like a noob some days. Considering I've only been here for like...five years, I'm not really surprised. o.o

-Fallon~