One Two (Oh Chang Hoon and Song Ho Bum) recently released their third digital single titled Bad Girl 2. Having already collaborated with Seo In Young in the past for Bad Girl, One Two received a lot of love from listeners through the success of the original version of the song. The news of the two artists uniting to work together again aroused the interest of fans fairly quickly. In a recent interview with Newsen, the duo made a eyebrow-raising confession about their relatively new track. "To be honest," One Two said, "Baek Ji Young was supposed to be the featured artist for Bad Girl 2. However, she was busy recording her song Don't Forget for the 'Iris' OST so our original plan didn't work out." "The moment Seo In Young heard Bad Girl 2, she immediately expressed her interest in doing it." They added, "There's really no friend we can depend on more than (Seo) In Young." Lately, there have been a variety of singers who have featured vocally for a song and performed the special collaboration together on stage - of which Mighty Mouth is a prime example. Therefore, why didn't One Two consider a different female artist to perform Bad Girl 2 on stage with? "(Seo) In Young has always been good at singing. Bad Girl 2 isn't an easy song. Even if we wanted to, we couldn't possibly ask the new girl groups who have debuted recently because it might burden them. The song requires a lot of practice." They continued, "We wanted to work with In Young again." With Oh Chang Hoon's smooth singing and Song Ho Bum's rough rapping, accompanied by Seo In Young's appealing voice, Bad Girl 2 is a concoction for a pleasing medium-temp ballad that can easily get stuck in your head. Take a listen to the live performance of Bad Girl 2 yourself and determine whether One Two made a good decision in collaborating with Seo In Young again. cr: CodeMonmonSeason3