It wasnt a lot of hype going in, Houstons brother, Gary, tells EW of that night.

She was like a little girl going into a football game not really understanding the magnitude of this game.

But she was very excited, like, Isnt this great?'

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NFL officials werent pleased initially with the final result.

As Minor toldUSA Today, They thought the harmonies were too different, that it was sacrilegious.

She did everything she could do to prepare for her voice, to have it at top notch.

She swam, she worked out, she played tennis.

And she always rehearsed.

Even when she wasnt on stage, she was always singing.

And it was a surprise when she performed the song.

A lot of people knew she was going to perform but they didnt expect her to bringthat.

Houstons label released the performance as a single and it became a Top 10 hit.

After the attacks on Sept. 11, 2001, it re-entered the Billboard charts, peaking at No.

There were always times when shed be like, Do you remember going into the Super Bowl?

and just being excited about it.

Shed say, It had that impact?

It affected people that way?

She never believed things were happening to her at that magnitude.

And she was just really excited and elated.

And just kind of shocked that people reacted the way they did.