MBLAQ will be following up their "Mona Lisa" promotions with "I Don't Know" starting next week. "I Don't Know" was made by the composers of "Mona Lisa" and tells the story about a guy who doesn't understand a girl's heart and mind.�The song is particularly favored for its witty lyrics and easy-to-follow melody, and is already expected to become a hit. MBLAQ's leader Seungho stated, "Every time people ask what the follow-up song for 'Mona Lisa' is, we say 'I Don't Know' and they look at us oddly. 'I Don't Know' is a song which battled 'Mona Lisa' until the end for the title song position. You can experience a different MBLAQ charm with this song." The boys have just successfully wrapped up their first solo concert, 'Men in MBLAQ'�on August 20th and are now busy with their upcoming promotions as well as their Japanese activities. Source + Image: mydaily via Nate