"It felt like a dream actually because it was such a moment and I'd never done that before and I really put a lot of beautiful time into it, so it was an incredible high," Keys gushed.
The Grammy winner's rendition of The Star Spangled Banner was recorded as the longest that the big game has ever seen, according to USA Today. The song was reportedly timed at 156.4 seconds, four seconds longer than the previous record held by Natalie Cole.
February has been an especially busy month for Keys, as she is also preparing for her Set the World on Fire tour that launches March 7 in Seattle.
"This tour is going to take it to the next stratosphere," Keys said. "It's going to be a visual, emotional and sonic experience that you're not going to be able to resist."
Additionally, Keys is hoping to have a major collaboration lined up for the future.
"I'd like to [collaborate with] Miranda Lambert," said Keys. "I think we might put something together. I told her today. We were this close in the dressing room and I just told her how much I love [her and husband Blake Shelton] and how incredible she is and how beautiful her voice is, so we'll see."