Red Velvet 레드벨벳 Peek-A-Boo (피카부) Dance Tutorial (Mirrored) | Ellen and Brian - YouTube
5 Things We Loved About Red Velvet's “Peek-A-Boo” MV | Soompi
RVcraveミ ✰+ᵃᵉˢᵖᵃ on Twitter: "Knetz said That PeekABoo choreography here is an optical illusion with hands (Long arms) focus on their arms https://t.co/s2eTdEJ76g" / Twitter
Red Velvet Reveals 2nd MV Teaser For Peek-A-Boo | Daily K Pop News