What goes on in Vegas most certainly will NOT stay in Vegas here!
Watch it go down (below)!!!
Maybe she could also pass this advice onto Justin Bieber?
Whoa!! Who dropped a dose of truth serum into this gal's cocktail?!
"I love her [Rihanna] and every time I see her, I'm reminded of the light that she has. There's a lot of dark in this business. I know a lot of people out there with the most detrimental entourages — they are the root of their demise. It's really unfortunate but you can't save these people. My days of celebrity saving are over."
Wowzers!!! We wonder if Katy is alluding to Ri's rumored re-connect with domestic abuser Chris Brown!?
Either way, we learned sooooo much about the Firework singer from one interview!!!
She cares greatly about her friends, but she ain't afraid to call them out in public!
[Image via WENN.]