In reply to catnipbitch.

Having seen Rita, Rihanna and Katy Perry all LIVE. I would say that Katy has the energy, Rita has the voice/ energy (remember that she is still new to all of this) and Rihanna has the looks. I'm sorry but as a live artist Rihanna has very little to offer and after 7 years she isn't going to get any better.... she is boring on stage. Rita needs to work on her overall star presence, but she has made an astounding start as a live performer considering that she has only had 1 single.
You need to post a video of Rihanna performing her first single to compare her and Rita, it's not fair to compare a new artist to one who has been in the game for nearly a decade.