FINAL SONG Former American Idol contestants Ace Young, center, Diana DeGarmo, center left, and fellow USO volunteer celebrities perform their final song as they conclude a USO spring tour on Ramstein Air Base, Germany, April 19, 2012. U.S. Navy Adm. James A. Winnefeld Jr., vice chairman of the Joint Chiefs of Staff, led the four-country tour. SHARE: Download: Full Size (0.07 MB) Credit: VIRIN: 257179-N-TXU81-679.jpg Photo Gallery