United Kingdom, April 27 -- Naomi Campbell feels "too old" for the Met Gala.

The 54-year-old supermodel won't be attending the annual New York fashion extravaganza next month but she is no longer able to deal with the "anxiety" it brings.

In a new installment of her YouTube series 'Being Naomi', the star showed off a behind-the-scenes of preparing for last year's gala, including the fittings for her turquoise Burberry gown.

And she admitted: "This is my last Met. It is my last. I can't... I'm too old. It's too much for me, the anxiety.

"I don't know what number this is, I think it could be either 20 or 21, can you imagine."

Each year, the Met Gala - which is co-chaired by Vogue's Anna Wintour and a panel of other famous faces - has a...