Atlanta based rap duo The Ying Yang Twins are set to perform for United States troops during a eight-day, five country USO tour. The rappers will headline a bill that includes former UFC champion Chuck The Iceman Liddell, comedians Gabriel Iglesias and Edwin San Juan and model/singer Mayra Veronica. Rappers Kaine and D-Roc are taking their charitable contributions one step further. The rappers will perform their new single Wild Out, which will be available on iTunes in the coming weeks. All proceeds of the sales of the track will go to The Brook Army Medical Center, located in San Antonio, Texas. The BAMC provides level-one trauma support and prosthetic limbs for soldiers in need. The Ying Yang Twins new album Karma is slated to hit stores in February of 2009.