He was almost as famous for his halo of blond curls as he was for his angelic voice.

But while his dulcet tones are still going strong, Art Garfunkel appears to have lost a remarkable battle to keep hold of his second most famous feature.

Just a year ago, the 66-year-old singer was still sporting a lush head of hair when he made an appearance at Hyde Park in London.

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Hair not apparent: Art Garfunkel seen at an awards event in Hollywood last night

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How he used to look: Art in 2003 at the launch of Simon and Garfunkel concert tour 'Old Friends' in New York

Flashback: Simon and Garfunkel; singer Art Garfunkel (left) and former singer-songwriter partner, Paul Simon in 1965

But as he arrived at an award dinner in Los Angeles on Thursday, he was virtually unrecognisable with a bald pate.

There were still signs of the unruly frizz that adorns most of his album covers. However, there is more than a hint of grey around the star's temples.

Hugh Hefner and his girlfriends Holly Madison (left)Bridget Marquardt and Kendra Wilkinson (right) were also in attendance

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Hollywood glamour: Actresses Jane Fonda and Eva Mendes arrive at the awards dinner in Los Angeles

And the astonishing rate at which it has disappeared have left fans wondering if he has enlisted the help of a hairpiece in recent years.

Garfunkel is most famous for his partnership with songwriter Paul Simon and the pair have sold more than 40million records since they first got together in 1963.