SM Entertainment released a new video of their S.M.Rookies. �These cute and pretty members are unable to get Red Velvet's "Happiness" out of their heads no matter what they are doing, and the boys are particularly adorable as they look up the girls' video and read their comments.

However, they turn on the charisma as they practice dancing to EXO's "Growl." �Check it out above to familiarize yourself better with the trainees before they make their big debut!