As one of the world’s most foremost supermodels, Naomi Campbell rarely looks anything other than picture perfect.But it was a different story for the 42-year-old beauty as she enjoyed a holiday in Ibiza earlier this week.Naomi displayed an incredibly receding hairline and shocking bald patches, the result of relying on hair extensions and weaves for the better part of her life, as she wore her hair tied back in a ponytail on the break.And while Naomi still looked in great shape in her patterned bikini, all attention was focused on her hairline, with her bare scalp causing concern among hairstylists.The supermodel, originally from Streatham, South London, has worn straight extensions over her naturally curly hair for a number of years.Traction alopecia occurs when the extensions pull on the natural hair causing it to break, and usually affects the hairline just above the forehead or the sides, where the hair is weaker.Stars including Paris Hilton, Victoria Beckham, Britney Spears and Alexandra Burke are all reported to have suffered traction alopecia as a result of hair extensions. Daily Mail