On the July 20 episode of 'M Countdown', Red Velvet took the win with ''Red Flavor''. As always, the winners had an encore. Red Velvet started singing their latest hit while other idol groups started walking off the stage. Then suddenly their label sunbae Suho, who was standing next to Seulgi, joined the girls' performance. 

SEE ALSO: EXO's Suho wins the 'Popularity Award' at 'Yegreen Musical Awards'

Suho perfected the key choreography to ''Red Flavor'', making the members of Red Velvet burst into laughter. 

Watch the adorable performance of Suho and Red Velvet in the clip above!