Obama's initial comments were interrupted by raucous applause and many in the Staples Center crowd stood.
For her first time hosting the Grammys, Alicia came out very chill and very cool, with a smile and clearly enjoying the vibe she was feeling in the room. Throughout the night, there were several moments that were genuinely touching, so in the interest of furthering that spirit, here's a look at the best moments from the 2019 Grammy Awards.
"They said I was weird", Gaga followed up.
Keys may well have added, "It's what we reminisce to", since the recurring theme of the evening was honouring icons. And he, Jay Rock, Future, and James Blake had to share that award for Best Rap Performance with Anderson Paak who tied for the title.
'Music is what we all love, music is what it's all about.
Apparently, it was Grammys host Keys' idea. Music shows us that all of it matters every story with every voice every note with every song.
Lopez - who has parlayed her successful music career into acting - said that music "kept me moving from the block to the big stages and even bigger screens".
Pinkett Smith was next, and she explained how music can touch the lives of those around us, no matter how we are feeling. It allows us to hear each other and to invite each other in.
"Whether we like country or rap or rock, music helps us share ourselves", she said.
Childish Gambino also later won "Song of the Year" for "This Is America".
Set to perform on the night are the likes of Lady Gaga, Red Hot Chili Peppers, Ricky Martin, Miley Cyrus, H.E.R., Camila Cabello, Cardi B, Post Malone, Shawn Mendes and Janelle Monáe.
The Grammys this year expanded the major categories of album of the year, record of the year, song of the year and best new artist from five nominees to eight, some say in response to the lack of diversity among nominees in previous years.