Girl's Day member Sojin recently participated in a project for composer�Kwak Tae Hoon's upcoming third album. Working with rapper�Song Ho Bum of One-Two, Sojin lent her sweet vocals for the album's title track, "Bum Bum Bum". It's a catchy song with an infectious melody that's perfect for the summer! "Bum Bum Bum" features lines from the nation's top lyricist, Lee Sang Baek of EZ Life, in addition to productional support from composer Kim Chang Rak. "Bum Bum Bum" can be purchased here or heard below! http://www.youtube.com/watch?v=Z0hhELHzpdY Source: Daily Star via Daily Economy