4minute's Gayoon and Jiyoon will be forming the project group 'Double Yoon'.

On December 26th, Cube Entertainment stated, "Gayoon and Jiyoon will be releasing a duet album in the middle of next month under the name 'Double Yoon'. We have finished their song recording and music video filming, and now we're in the final stages of editing their album."

Because Gayoon and Jiyoon are the main vocal and rapper of 4minute, their album will be focusing on emphasizing their talents. Cube Entertainment has explained that the songs will be a different dance and ballad type compared to 4minute's usual style.

Cube Entertainment added, "Like the collaboration between HyunA and Hyunseung, we will show off a new color than the one we have shown so far. 'Double Yoon' will be promoting on air next month as well."