Beyonce Expose Major Cleavege In Vegas Babious 8 years ago Beyonce rocked a very revealing plunging black gown at the Mandalay Bay Events Center in Las Vegas on Saturday night.Bey looked lovely as she watched Miguel Cotto and Saul ‘Canelo’ Alvarez boxing match with her husband Jay Z. More photos below… Share this:Related Posts:Britney Spears threatens to expose her familyAdele vanished off stage in Las VegasShania Twain announce Vegas ResidencyJennifer Lopez and Ben Affleck tie the knot in Las Vegas