Sneak Peek: 'VH1 Divas' Opening Number

Hats off, ladies! Keri Hilson, Katy Perry, and Sugarland’s Jennifer Nettles suit up in rehearsal footage for “VH1 Divas Salute the Troops,” airing on the network this Sunday at 9 p.m. The gals, dressed in traditional army outfits, grab a seat next to one another while practicing their rendition of the Andrew Sisters’ “Boogie Woogie Bugle Boy” at the San Diego military base. Nicki Minaj will also join the trio during the opener and MC Lyte will team up with Sugarland for a special performance. Check out the gang below.