Lady GaGa - I liked her when she first started getting popular, she seemed like the biggest popstar ever but then it just went downhill...she seems to think her pop music is above other pop music and that she is creating "real art" or something. I just find her very irritating and try-hard.
Britney Spears - I don't have a problem with her. Since her breakdown she seems to have matured and become classier in a weird way. I like that shes just Britney, she doesn't try to be anything bigger or different.
Madonna - She just seems desperate to create controversy for attention lately. I don't think she's really in the british media enough to irritate me

Rihanna - Far too much sex. Everywhere. She's awful live. I quite like some of her songs but I don't really care for her.
Katy Perry - Very ****ing annoying

One of The Boys was a good album, her second is ****. She comes off as very try-hard and seems to consider herself "alternative" even though she pushes out the same generic pop music as everyone else now. Fireworks is an awful song. She's terrible live. And what was with the concert film of her?
Adele - Best vocalist on the list. Her songs can get dull if you listen to too many in a row but I don't think she's dislikeable.
Ke$ha - Not a fan of the music. Don't really see the genius that most people can.
Kylie Minogue - I quite like her
Beyoncé - No real opinon to be honest, she's just there xD
tldr I voted for Katy Perry :p