Translation:Singers are busy.
I was first introduced to Korean a long time ago by listening to 2NE1, and there's a song where she sings "nan babba (난 바빠)" and the translation (it even shows in the title) is "I'm busy". Is this an informal speech or something like that? I'm lost about the ㅡ that disappeared x)
Plural and non plural are accepted now :) this particle can mean either but if you put 들 it makes it clearly plural. Hope this helps♡