[4] In January 2012, they were part of the KBS drama Dream High 2: in order not to be confused with the singers of the same name (Yim Jae-beom and J. Y.

Park and is a dance song which combines hip hop, rock and electronica in a new genre called "hip-rock tronica",[6] and gained popularity for the free-spirited and cheerful performance.

[18][19] The single album also features "Hooked" (꽂혔어), a collaboration with Miss A's Suzy titled "Before This Song Ends" (이 노래가 끝나기 전에), and the instrumental version of "Bounce".

[24][25] On July 7, they opened Wonder Girls' Wonder World Tour in Seoul, which was held in front of 5,000 fans at Jamsil Indoor Gymnasium.

[26] They were the opening act for the September 8 stop in Singapore, too, where they performed "Bounce" and "Hooked", and later joined Hyerim for her solo stage.

[33][34] JJ Project earned 1.25 billion won over the year[35] from their activities in the music field, and endorsement deals with LG's teen cosmetic line nana's B,[36] clothing brand TBJ,[37] and Reebok.