Is she or isn't she? If you needed further speculative evidence of Gisele Bundchen's alleged pregnancy, we offer Exhibit B: the Brazilian model showcasing her possible baby bump in Rio de Janeiro for a pre-World Environment Day celebration.

As pregnancy rumors continue to swirl, Gisele joined the mayor of Rio de Janeiro Eduardo Paes and the Environment Minister Izabella Teixeira during the Green National Festival to help plant 50,000 new trees. If Mrs. Tom Brady is in fact expecting, she wasn't afraid to get on her hands and knees and get down to work.

While we'd be pretty stoked if Gisele were pregnant, we're having a hard time telling if the white tee is actually revealing a pregnant belly, especially since the slightest weight shift in the svelte model isn't exactly easy to gauge. Still, we can't help but notice the small bump.

We'll let you know if her pregnancy is confirmed. Until then, check out the photos and tell us if you think Gisele is with child.

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  • Gisele Bundchen and Baby Benjamin on the Beach

    Gisele Bundchen takes baby Benjamin to the Caribbean for some fun in the sun.