Justin Bieber, Selena Gomez Kiss Among Billboard Awards Highlights

Show also featured a Rihanna/Britney lip-lock and a tribute to Beyoncé.By Jocelyn Vena Justin Bieber and Selena Gomez at the 2011 Billboard Music Awards Photo: Kevin Mazur/ WireImage They say that what happens in Vegas stays in Vegas, but on Sunday night, pop culture lovers everywhere were treated to a festival of debauchery and fun at the Billboard Music Awards, which were held in Sin