Actress Eva Mendes says the only beauty experiment she regrets was bleaching her eyebrows. The 42-year-old 'Lost Rivers' actress said she gets more compliments on her full head of long brunette hair than on anything else, reported US magazine. Eva Mendes celebrates birthday at Frank Sinatra's vacation home "I only wish I had never bleached my eyebrows," Mendes said. The actress, who just had her second baby with husband Ryan Gosling, said her favourite cosmetic is a good concealer. "A good concealer can do more for your complexion than double-sided tape," she said. WATCH: Eva Mendes on Bringing Girl Power to Sierra Leone | Independent Lens | PBS