WJSN
Debut Date: February 25, 2016
Gugudan
Debut Date: June 28, 2016
Blackpink
Debut Date: August 8, 2016
Momoland
Debut Date: November 10, 2016
These are the 4 female idol groups that debuted in the same year but, the achievement gap is too big that some netizens thought that Blackpink is the most senior group among them!
Source : DKPopNews
