I'm pretty sure Beyonce isn't a huge Katy fan, but I'm also pretty sure she doesn't care about Rihanna or any of the other pop girls. Nothing bad, Beyonce just isn't into pop music. Katy probably doesn't really like a lot of the pop girls' music, her taste seems to be more rock-influenced, but she's more personable and friendly with her peers.
I'm positive it isn't, but if the guest is Cyndi Lauper

I need someone more relevant than Lenny but less relevant than Katy and also not in her 60s.