MIRAMAR, Calif., Dec. 4, 2010 /PRNewswire/ -- Katy Perry, Sugarland, Keri Hilson, Nicki Minaj, Paramore and Grace Potter saluted America's armed service men and women in signature VH1 Divas style tonight with blow-out performances from military bases around the world. The USO Presents "VH1 Divas Sal