SEE ALSO: ILLIT praised for making a significant improvement in recent encore live performance

The singers partnered up with talented non-celebrity vocalists and held amazing collaboration stages.�

Eunji sang a ''What A Friend Is'' with Yu Hye Seon, Eric Nam and Park Seri�sang ''Perhaps Love'', OST queen Lyn collaborated with Kim In Hye�for ''Yearning'', and Hongki and Oh Ye Jin�sang ''Reason for Waiting''.

Check out their outstanding duets!