NCT Taeyong, the master of flicking foreheads, takes the M Countdown stage.

You all worked so hard on today's M Countdown stage, Czennies, and the WACK team! Please give lots of love to WACKWACK and Ttakbam!!!

A selfie of Taeyong, who will be performing the WackaWak stage on M Countdown, taken with a flick on the forehead pose

He posted it on Instagram! Waiting for the stage by the forehead flicking master Lee Taeyong!!