United Kingdom, June 6 -- Lulu has always been a "very private" person.

The 76-year-old singer shot to fame as a teenager in the 1960s with her now-signature song Shout but insisted that "nobody knows" who she really is because she has always been "very careful" when it comes to choosing what she reveals about herself.

Speaking on BBC's The One Show, she said: "A friend of mine once said to me 'People think they know Lulu, but nobody knows you...' and I think it's partly to do with the fact that I come from a Scottish mother who said 'Don't wash your dirty linen in public!'

"So I was very...I've always been very careful, very private. I'm chatty, but I keep a lot of things to myself, so now I'm talking about everything."

The Eurovisio...