What goes on in Vegas most certainly will NOT stay in Vegas here!
Watch it go down (below)!!!
But everything went so well!
She must have been because gurlfriend was looking none too pleased as she headed to her hotel after the superstar celebration fit for a queen.
But we have to admit, after the long and tiresome day RiRi probably had, she still looked damn crazy flawless!
From the makeup to the hair, not a thing was out of place.
If this is what late-night partying does to a person, sign us up!
[Image via Will Alexander/WENN.]