4minute members Heo Gayoon and Jeon Jiyoon will form project group ‘Double Yoon’ and are planning to make their new debut this January.On December 26, Cube Entertainment’s CEO Hong Seung Sung revealed, “Double Yoon will conduct official promotional activities starting next month. We wrapped up the music video filming, but we’re still adding the final touches to the album.”The duet album will contain songs that will highlight their singing and rapping talents. It will include dance and ballad songs different from their 4minute’s flavor.Source: 4minute