I was in high school when Alicia Keys‘ “Fallin'” came out. It was everywhere and with her debut album release, Songs in A Minor, she became the best-selling new artist of 2001 and a GRAMMY Award winner.

Keys’ subsequent releases made her a living legend, and arguably, one of the most talented and powerful artists to ever live. She can sing anything, look good doing it and with two episodes of “The Voice” under her belt, she’s also proving she might be the most sincere and humble GRAMMY winner to ever live.

As Keys heard the first few bars of her “If I Ain’t Got You,” being sung behind her, everything changed– her face lit up, but not in the “can you believe someone is singing my song right here, right now?” No, it was more of a honor for her, she couldn’t wait to hear what Lauren Diaz was going to do with her 2004 hit.

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In less than 30 seconds, Keys had heard all she needed to hear. She pressed that button and spent the next 2 minutes cheering on Diaz as she powered through the song.

And this isn’t just any song, Keys won a GRAMMY for Best Female R&B Vocal Performance for “If I Ain’t Got You.”

When the song was over, Keys marched up to the stage, hugged Diaz and said, “wow.”

The audience had learned before the performance that Diaz grew up idolizing Keys, but the other coaches still put up a decent fight to get her to join their teams.

After pitches from Miley Cyrus, a poem from Adam Levine, and a great talk from Blake Shelton, Keys was back. And what did she do?

Keys sang the song back to her. After she said, “can you just tell me a little bit about yourself?”

Yes, that’s right, Keys, 15-time GRAMMY winner sang the song back to her.

And with that 30-second performance, Keys changed “The Voice.”

And, maybe, I teared up.