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American R&B artist Miguel recently took to the stage while in Stockholm to simulate a graphic sex act - and he is in no way the first performer to do so. No, artists have been pretending to have sex on stage for years, for reasons that we're not altogether sure about.

Some stars choose the risky path of grinding up against fans, while others choose to go it alone with a little self-love - Madonna, we're looking at you, here. And there's all sorts of different ways to go about it; from Nicki Minaj's, uh, prop, to Miguel's invisible friend, there's no hard and fast rule when it comes to shocking people on stage.

So we've rounded up 10 stars who aren't afraid to express themselves on stage, from the sublime to the ridiculous. Check them out here.