Those who follow reality television with a keen eye will be all too aware of Diana Vickers ? once of X Factor, now about to storm the pop charts with a song called Once.

If you're new to her, here?s the deal: she has the speaking voice of a girl from Lancashire begging her parents for fish and chips, as her mother silently scrubs the front step wearing a long flowery dress, and her father stares angrily at a betting slip. And yet, when she sings she absolutely comes alive, like a malfunctioning synthesiser with a mind of its own.

She also happens to be bucking a reality television trend, which demands that you do your stint, then disappear entirely, like Girlband, or Lisa from Big Brother ? remember them? Of course you don't!

With that in mind, below are five other reality contestants who haven't so much come back from the dead, as just surprised us a little bit for one reason or another? (not including Makosi from Big Brother who became a prostitute)?