divas_katy460.jpgCourtesy: VH1

Katy Perry is channeling her inner pin-up girl in this sexy promo shot for VH1 Divas Salute The Troops special.

Is it just us, or does Katy look a little smaller up top than usual? "Her team thinks her boobs look too big," a source tells Us. The mag claims that VH1 downsized Perry's chest in the pic - and from the looks of it, we'd have to agree!

During the concert to be held at the Marine Corps Air Station Miramar in San Diego, Katy will be joined by fellow divas Grace Potter & The Nocturnals, Nicki Minaj, Sugarland, Keri Hilson and Paramore.

Hosting the big night is comedian Kathy Griffin. Loves it! And even though Katy's cleavage has been minimized, she still looks gorge!