Rihanna hinted at an exciting collaboration in September when she tweeted, 'Just left the studio... Recorded a #monster hook for one of my favourite artists! And that's all I can give you...' and it's just been revealed that it's only with Eminem. We loved it the first time they duetted (remember Love The Way You Lie?) and new single The Monster keeps us tied up nicely until Slim Shady's album comes out next Tuesday, which features the likes of Kendrick Lamar and Sia, oh, and is produced by Dr Dre, obviously.