Gisele Bundchen is planning to star in a steamy calendar as a birthday
surprise for her boyfriend.

The Brazilian supermodel, who is currently dating American football star Tom
Brady, is set to pose in sexy lingerie and don a New England Patriots shirt
to celebrate Tom turning 31 on August 3.

A source said: "Gisele wanted to do something special this year, so she is
making a one-of-a-kind calendar for him.

"She has got some racy lingerie shots, a birthday cake shot for August, and
the expected picture of her in knee socks and his jersey!"

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Gisele has been discussing her ideas with several of her photographer
friends and wants to shoot twelve different looks, which she plans to bind
and present to Tom.

The source added to America's OK! magazine: "Tom has no idea about Gisele's
plans, but he is going to love it!"

Tom recently revealed he fantasizes about the 28-year-old beauty dressing up
as a superhero.

He said: "I want her to wear the Wonder Woman outfit."