It's CBS. The NFL doesn't run the broadcast. But not Taylor Swift lol. I don't think she even did anything to draw attention to it besides existing.
I actually enjoyed seeing her in the stands, though. She was very clearly emotionally invested in the game, and I thought her reactions were genuine and added to the broadcast.
You understand that they can find your social media regardless, right?
If you have it and publicly post, it's not private and they can and should consider your public behavior as part of the process of deciding whether to hire you.