Rihanna parties with Katy Perry

Rihanna and Katy Perry had fun last night! They went to Osteria Mozzia Pizzeria, then they headed to Voyeur Nightclub in West Hollywood. RiRi tweeted:

Just had a fun wild night out wit my bff @Kristin_Alis! Love u barecunt!!! U always make me feel like a fuckin rockstar!!!!