MBLAQ is making its big comeback this month with their third mini-album, and after teasing us with the album jacket release, the quintet has revealed a music video teaser of its newest track "Mona Lisa"! The teaser spans thirty seconds and features a young lady playing the accordion and each member in an old building. As earlier reported, "Mona Lisa" features a Spanish electronic inspired beat that fans will be sure to like. Check it out below!