Nicki Minaj

It feels late to be tipping rapper Nicki Minaj, but she is just about break into the mainstream with her debut album Pink Friday. She has already been a guest on songs by Kanye West, Christina Agulera, Usher and Mariah Carey, and she is funny, fast and cartoony, like Eminem when he's in good mood. And the prospect of a new Britney Spears album is exciting. According to Glee creator Ryan Murphy, the new one is return to her dane roots, and is "great".