What goes on in Vegas most certainly will NOT stay in Vegas here!
Watch it go down (below)!!!
That's a stanky expression if we ever saw one!!
As Pharrell leaned in for an audience snap, the Stay singer's face went from thrilled to to seriously stinky sad in a matter of seconds.
Was the hat smelly, his armpits or the Shrine itself?!
We have NO CLUE!!
But when the Happy singer moved in for the pic, RiRi was probably thinking "_______________!"
[Image via Getty Images.]