Singer IU will soon be appearing on MBLAQ's Idol Army as a female guest. It is known that IU and MBLAQ's Thunder trained together and have developed a strong relationship. When MC Shin Bong Seon asked IU what Thunder was really like she responded, "He has a really eccentric and cute personality." Here are some collaborations the two have done together: Big Bang - Lies http://www.youtube.com/watch?v=Y0ndTosuP9c Super Junior - Sorry Sorry http://www.youtube.com/watch?v=C2qTqdlBg6I Thunder also appeared in IU's Mia music video. http://www.youtube.com/watch?v=QgWT6Soq0t8 The episode will air on February 24th.