London, June 6 : Victoria''s Secret model Marisa Miller has dismissed claims that she has undergone breast enhancement surgery, insisting she is "100 percent natural".

The stunning blonde, who bagged the top spot in Maxim magazine''s Hot 100 list last year, revealed she is naturally voluptuous but works hard to maintain her curves.

"A lot of people believe that because I''m curvy - and blonde - I''ve had a boob job or some other kind of plastic surgery, which isn''t true," the Sun quoted her as saying.

"I''m 100 percent natural. But I have to work hard to stay in shape. There''s no magic pill. Believe me, if there was, I''d know about it," she added.

The California born further explained: "Working out is not a luxury, it''s a necessity. Surfing is my favourite workout." (ANI)