Bertrand Rindoff Petroff, Mike Windle/Getty Images
Both the "Va Va Voom" singer (how appropriate!) and Here Comes The Boom actress (ditto!) stepped out in tops that put their ta-ta's on display (to say the least!). Nicki's Roberto Cavalli curve-enhancer includes a cut-out made for champion cleavage, while the deep V on Salma's leather stunner keeps up in epic form.