Burns was the fiancee of Bills sixth-round rookie linebacker Tony Steward, and the team released a statement on her passing.
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Steward posted a touching message on his Instagram account regarding Burns’ passing.
Shortly after her diagnosis, the couple created a campaign called Fight Like A Girl to raise money and awareness for ovarian cancer.
Steward had proposed to her just seven weeks ago.
A photo posted by Brittany Burns (@bburns) on Dec 13, 2015 at 9:25am PST