I was often mistaken for Mary Hopkin (of 'Those were the days my friend' fame) back in the sixties, although I think that had everything to do with a similar hairdo; I can't sing and couldn't see the resemblance. Then had a phase of being compared to Gill in Crossroads; that was a bit spooky as I didn't watch the programme but turned the TV on one day and actually felt a shock as even I thought it was me!
Now - I'm not sure I know the woman I see in the mirror - she can't be me as she looks far, far too old.