Beyonce, 29, whose skin looked much lighter than usual, was seen wearing a pair of 635 pounds jade suede Daffodile heels by Christian Louboutin.
"The most effective skin-lightening agents are hydroquinone and kojic acid, creams which patients apply to the skin," the Daily Mail quoted Dr Sunil Chopra, a consultant dermatologist at the London Dermatology Centre, as saying.
"The effects are temporary and work by inhibiting the enzyme ... responsible for the skin's pigment. Both are very popular. I see maybe three people every week who want this procedure.
"But it cannot be used over the whole body. It is very unlikely she has had her skin bleached in this way," he stated
