Katherine Jenkins sleeps with her eyes open.
The 33-year-old classical singer admits she suffers from the rare condition Nocturnal Lagophthalmos, which means she's unable to shut her eyes completely when she nods off.
She said: "The best chat up line to ever come my way is, 'Was you father a thief because he must have stolen the stars from the skies and put them in your eyes?'
"Speaking of which I always sleep with my eyes open.
"My eyes don't close properly - they are always at least half open - and when I go to sleep I look like I'm still awake. And I don't really have dreams either. My mum would always say, 'Katherine, are you awake or are you asleep?' "
The blonde beauty has battled with the medical condition, which it is thought to only affect 10 per cent of the population, since she was a youngster.
Medical professionals believe Nocturnal Lagophthalmos is a form of facial paralysis, which leads to dry and damaged eyes, but the cause of the condition is not yet known.