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"Don't Be Happy" (행복하지마) is a collaboration digital single by MAMAMOO and Bumkey. It was released on January 9, 2014.

It is MAMAMOO's first pre-release single before their official debut with the mini album Hello in June 2014.

Track list[]

  1. "Don't Be Happy (행복하지마)" - 3:36
  2. "Don't Be Happy (행복하지마) (Inst.)" - 3:36

Video links[]