Rihanna Surprises Katy Perry in Vegas!

Rihanna surprised Katy Perry with a lavish Bachlorette party in Vegas over the weekend! With over 20 guests in attendance, RiRi arranged to watch KA by Cirque de Soleil and later the BFF's posed with the acts backstage.

Earlier in the night Katy Perry tweeted, "signing up for a liver transplant now…"

After the show, the girls jetted off to a secret location and were sure it included lots of booze and boys :) RiRi seems like a great friend!