M-Net revealed hit line-up for M Countdown Episode 666. The episode will include performances of former Wonder Girls member Yubin, Lovelyz' Sujeong, TXT, and BVNDIT.
Fans will also get to see debut stages of new rookie girl groups Secret Number, woo!ah! and RedSquare.
The episode will be aired on 21st May at 6 PM KST.
Check full line-up in the graphic below: