This marks yet another rough year for the Grammys.
"I know i'm not there tonight (trust, i tried and still truly wished it had worked out tbh) and i know i said i try not to put too much weight into these things. but (expletive). this is wild and attractive. thank you so much", she tweeted after learning about her win.
They're also the first-ever Korean group to present an award during the ceremony.
Women are hoping to get their due after the head of the Recording Academy - which includes more than 13,000 music professionals - told them previous year to "step up" if they wanted to do better on Grammys night.
They are both up for album of the year, alongside Cardi B, H.E.R., Post Malone and Janelle Monae. A little later, Gaga was shocked again when her single "Joanne (Where Do You Think You're Goin'?") won for Best Pop Solo Performance, for which she said she was absolutely shocked. "Just knowing that so many women are nominated this year, looking back from last year to this year when I was on the stage at the Grammys, you could see that I was frustrated about the opportunities and about our visibility as women", said Monae, who gave powerful speech last year ahead of Kesha's emotional and striking performance celebrating sisterhood and women's rights. Pop singer Ariana Grande recently tweeted that she pulled out of performing this year due to a creative disagreement with its producers, while rappers Childish Gambino (a.k.a. Donald Glover), Drake and Kendrick Lamar all reportedly turned down offers from the show, which has a fraught history with hip-hop artists.
In the Best New Artist category, 6 of the 8 nominees are women.More news: Florida man suspected of DUI appears to dance through sobriety test
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Keys told CBS news this year´s greater representation from women was "far overdue".
Drake has been vocal about his disdain for the Grammys and the lack of diversity among its nominees.
As for other ways to watch the Grammys, you can also tune into American network CBS.
Some complained that a black artist should be involved in the tribute, while others said stronger vocalists should perform over Lopez.
Brandi Carlile and Kacey Musgraves swept the boards in their respective genre categories, Americana and Country, making the ones to beat in the night's main category - album of the year.
The soundtrack was produced by Lamar and includes performances by Lamar, Travis Scott, The Weeknd, 2 Chainz and more. Yolanda Adams, Fantasia and Andra Day will honour the late Aretha Franklin with a performance.