Alicia Keys Impresses Grammy Audience

cnn.com: Alicia Keys took us to "Club Keys" as host of the Grammys on Sunday night, and viewers seem open to becoming regulars.

"I think @aliciakeys was one of my favorite parts of the #GrammyAwards the most perfect, genuine & gracious host," wrote musician Leona Lewis on Twitter.

In one of many stand-out moments, the 15-time Grammy winner used her musical prowess to dazzle the audience with a performance packed with major hits. Flanked by two pianos, Keys performed everything from Lauryn Hill's "Doo Wop (That Thing)" to Roberta Flack's "Killing Me Softly With His Song" to Kings of Leon's "Use Somebody."

At one point during her medley, Keys played on both pianos at the same time.

"Music is just, you know, those songs that just live inside of you. It lives inside of me. And you just love it so much because it was done so well that you wish you wrote it. That's how I feel about these songs. I wish I wrote them," she said.

Keys, who opened the show with some help from Lady Gaga, Jennifer Lopez, Jada Pinkett Smith and Michelle Obama, said the night was about celebrating "the greatness in each other."

On social media, Keys was celebrated for her greatness by the internet reviewers of social media.

In a candid moment, Keys shared a personal story about how John Mayer once split his Grammy with her after losing the best song to him in 2005. Mayer, with the other half of the Grammy in hand, joined Keys to present this year's award in the same category.