Trouble Maker s the debut album of South Korean co-ed subunit Trouble Maker consisting of 4minute's HyunA and Beast's Hyunseung.
Released on December 1, 2011, the album marks the first collaboration between the two away from their groups. The duo promoted the album extensively, including numerous performances.
The mini-album consists of 4 tracks; the title track "Trouble Maker", a ballad song called "The Words I Don't Want to Hear", a collaboration song from HyunA and Rado called "Time", and a solo song from Hyunseung called "Don't You Mind".
Trouble Maker won a MNet M! Countdown award for their song "Trouble Maker". The song also won the Mutizen Song on Inkigayo on January 8th.
On November 24, Cube Entertainment announced that HyunA and Hyunseung would form a sub-unit. The agency also unveiled the unit's album jacket photo for their self-titled mini-album Trouble Maker. The photo features a private party concept which showcases Hyuna and Hyunseung dressed in black suits.
On November 26, 2011 Trouble Maker released the track listing for the then-upcoming debut album as well as an audio teaser. Hyuna and Hyunseung also performed at the 2011 Mnet Asian Music Awards to further promote the album, showcasing provocative dancing and what was believed to be an intimate kiss, forcing a Cube Entertainment official to make a statement that "[t]he kiss was not lip to lip, but actually lip to cheek."
Trouble Maker unveiled their first mini-album on December 1, 2011.
On December 6, 2011 HyunA and Hyunseung performed as Trouble Maker at the United Cube concert in London as part of their promotional tour. They then moved onto Brazil a week later.
After promotions for "Trouble Maker" began, a large number of fans complained about HyunA and Hyunseung's racy choreography, and the duo were also forced to change their dance routine due to it being considered too sexy for national broadcast, with a new routine taking effect as of December 9's episode of KBS's Music Bank.
Since the released, it had been featured in KBS's Dream High, where After School's Kahi and actor Kim Jung Tae replicated the 'Trouble Maker' stage. Also Infinite's members Sungjong and Sungyeol parodied “Trouble Maker” during First Solo Concert “Second Invasion”, which took place on February 11-12 at Seoul Olympic Park.