Born TO Beat.

For @chomiczynka's KPOP 2012 collection: http://www.polyvore.com/kpop_2012_january-april/collection?id=2116937
 
BtoB is a seven member group that debuted on March 23, 2012 with their mini-album Born To Beat. The album contains "Born to beat", "Insane (Secret)", "Imagine", and "Monday to Sunday". The Asia Special Edition tracklist also contains "Irresistible Lips", "Father", the instrumental versions of "Irresistible Lips" and "Insane", as well as the original songs.
 
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Korean MV Challenge: http://www.polyvore.com/korean_mv_challenge/collection?id=1448255
15. MV with guest appearance [of actor/idol not from the band]
Btob-Insane
 
The MV features Chorong! I love her so much<3 And I have to admit, "Insane" was one of the best debut songs ever.