Madonna, she hasn't had a decent position on the Hot 100 in ages. She tried with Bitch I'm Desperate, Medicine, and God Control but nothing stuck.
Meanwhile, Mariah is nestled comfy at number on
First British female #1 in the US since Kim Wilde she did THAT
He does that to most X Factor winners, they only really have a chance of multi-album success if they're in a group and even then some of them flopped.
To answer the OP again... Lily Allen,