Katy Perry: New York Giants
After the New York Giants win in 2012, we have no idea why Katy wasn’t spotted fangirling before; she became known as a Giants fan. She has dedicated her entire outfit to her team’s colors, from head-to-toe, so that we can forgive her for any potential transgressions. Whether for publicity or fan-girls, regardless, the Giants got some more attention.

Katy Perry: New York Giants
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Jessica Biel: New England Patriots
She not only supports her husband but together, they support the New England Patriots. Well, being a fan and supporting one of the 21st century’s best sports franchises is not really difficult. After all, the New England Patriots, since 2000, have had six Super Bowl victories.

Jessica Biel: New England Patriots