Trouble Maker (트러블 메이커) is a band of 2 members under the agency Cube Entertainment. The band is composed of Hyunseung, and HyunA. They debut the 1st December 2011 with the album 'Trouble Maker'. Their most popular music video 'Trouble Maker' reached more than 50'000'000 views on Youtube. Trouble Maker get their first win the 15th December 2011 at M!Countdown with 'Trouble Maker'.