Isn’t it wonderful when idols live up to their pre-debut hype? After months of faking us out with successful preview singles, WA Entertainment‘s rookie quartet Mamamoo stylized as MAMAMOO) has finally arrived! We hope other 2014 debutees are taking notes because we’ve found the one to beat. As expected, six-track first mini-album HELLO drives home what we’ve known for a little while now: Mamamoo’s Whee In, Hwa Sa, Moon Byul, and Solar all have vocal chops you can write home about. Actually, they can sing, rap, dance, and have a confident camera presence rarely seen in rookie idol groups these days. We dig. Will their live stages live up to their studio performance? We can’t wait to find out. Leading HELLO is ”Mr. Ambiguous,” a song that calls a guy out on his mixed signals. All the star cameos Mamamoo teased on their YouTube channel are present and accounted for in the song’s eye-catching music video: handsome guitarist Jonghyun of CNBLUE, starstruck “staff member” Jung Joon Young, trolling “producer” Baek Ji Young, and more. Wanna hear more? Don’t miss the music videos for Mamamoo’s preview singles, “Don’t Be Happy” ft. Bumkey and Wheesung/K.Will collab “Peppermint Chocolate.” There’s no MV for their “Hi Hi Ha He Ho” song with Geeks, but don’t worry — it’s on the HELLO album.