The have been moments of self doubt in my life: Victoria Beckham

London: Singer-turned fashion designer Victoria Beckham says even though she is a celebrity, moments of self doubt have been a part of her life too.

The 40-year-old designer insists that one should never lose hope in time of crisis, reported Daily Mirror.

"I think everybody has crazy moments of self-doubt and an element of that is probably quite important. But you should definitely not waste too much time being negative in any way," Victoria said.

"It`s about positive thinking, positive energy, and fighting if you need to fight," she added.

The mother of four, who opted for a low key celebration to mark her 40th birthday last week, said she always dreamt of becoming a designer, but insists she did not do it to "prove anything to anybody".