What we wouldn't give to be a fly on the wall of this shindig!

Justin Bieber had a huge night at the Grammys on Sunday, winning his first award and performing with Skrillex, and he feted his accomplishments with an after party at his fave spot The Nice Guy. Kourtney and Khloe Kardashian attended, and we have a feeling the eldest K sister is still doing the bone dance with The Biebs!

Hailey Baldwin was nowhere in sight, and neither were Kourt's sisters Kendall and Kylie, who are actually friends with the Canadian crooner. We still can't believe JB would be into the mother-of-three, but allegedly he has a thing for older women. One person who can't love this pairing is Scott Disick, who reportedly is trying to win back his baby mama.

We guess it wasn't too late for Justin to say sorry to Kourtney for hitting it and quitting it!

Take that, Yeezy!

Taylor Swift won the award for Album of the Year at the 2016 Grammys, and she slammed Kanye West (without actually saying his name, natch) in her acceptance speech. Taylor first thanked her collaborators and producers, and then she got into it:

“And as the first woman to win Album of the Year at the Grammys twice, I want to say to the young woman out there, there are going to be people along the way who try to undercut your success or take credit for your accomplishments or your fame. But if you just focus on the work and you don’t let those people sidetrack you, someday when you get where you’re going, you will look around and you will know it was you and the people who love you who put you there, and that will be the greatest feeling in the world."

As you know, Kanye came under MAJOR fire earlier this month when lyrics from "Famous," off his new album, The Life of Pablo, surfaced online. "I feel like me and Taylor [Swift] might still have sex / I made that bitch famous," he rapped, referencing their MTV VMAs drama from back in the day. We already knew T. Swizz was pissed, but we love that she publicly called him out for it. Someone had to!

As far as other big winners of the evening, Justin Bieber finally won his first Grammy, The Weeknd won two, Alabama Shakes won four and Kendrick Lamar, who had the most nominations with eleven, won a total of five.

Click thru for the COMPLETE list of winners!

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Gorgeous girls!

On Monday some of music's biggest names gathered at the Staples Center in Los Angeles for the 58th annual Grammy Awards, and from sparkly gowns to sexy cut-out dresses, there was a wide range of styles present on the red carpet. And the hairdos? Taylor Swift certainly made her mark with an short bob, and Zendaya kinda missed it with her blonde bangs/mullet combo.

So what did the ladies wear? Kaley Cuoco rocked a silver Naeem Khan jumpsuit, Stuart Weitzman shoes, a Rauwolf clutch, and H. Stern jewelry while Carrie Underwood went with a more formal black Nicolas Jebran dress, Giuseppe Zanotti shoes, and Johnathon Arndt jewelry. Ariana Grande went with a bold, red Romona Keveza dress, Giuseppe Zanotti heels, a Jimmy Choo bag, and Ciara left little to the imagination in a Alexandre Vauthier dress. Hot!

Selena Gomez wore a sparkly Calvin Klein Collection cut-out dress and struck a pose with bestie Taylor Swift, who wore a bold midriff-baring Atelier Versace dress, but it seems like the theme of the evening was low-cut black numbers! From Bella Hadid (Alexandre Vauthier Paris) to Zendaya (DSquared2) to Demi Lovato (Norisol Ferrari), it was all about cleavage and formalwear-inspired threads.

Tell us: What was YOUR fav look of the evening?

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Adele attended the 2016 Grammy Awards at the Staples Center in Los Angeles on Monday, but she didn't walk away with a single award. Huh?!

Well, it turns out Adele won't be winning any awards, because her third album, "25," which has sold 8 million units in the United States alone, was released AFTER Grammy eligibility. It will qualify for awards at the 2017 ceremony, so we have a feeling it will clean up next year!

The 27-year-old singer wore a Givenchy dress and Lorraine Schwartz jewelry, and she looked absolutely incredible when she posed for photos on the red carpet. Can't wait to watch her performance!

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The Weeknd hit the Grammys red carpet with girlfriend Bella Hadid, and we're so distracted by her enviable figure, we aren't even paying attention to him -- or the fact that he's already won two major awards tonight! Bella wore an insanely low-cut Alexandre Vauthier Paris dress, and this almost has us convinced that she's hotter than her supermodel sis Gigi! After working it at New York Fashion Week, Bella flew out to LA on Sunday to be by her man's side.

The Weeknd (aka Abel Tesfaye) earned Best R&B Performance for "Earned It," which is featured on the Fifty Shades of Grey soundtrack and Best Urban Contemporary Album for "Beauty Behind The Madness." The Weeknd is up for seven nominations tonight, including Album of the Year and Record of the Year ... we're kinda rooting for him!

Jordan Strauss/Invision/AP

Justin Bieber hit the red carpet at the 2016 Grammy Awards at the Staples Center in Los Angeles on Monday, and the 21-year-old pop star was joined by a very special guest: his little brother Jaxon!

And what's even more awesome than that? Justin picked up his first Grammy EVER tonight during the pre-show ceremony for Best Dance Recording for “Where Are U Now” with Jack U. “Beliebers.. We did it! I love you. Now get ready for the show. Not done yet. #GRAMMYs,” Justin tweeted.

They’ll be performing together during the show this evening, so we'll definitely be watching!

Jordan Strauss/Invision/AP

Taylor Swift may have taken home a ton of awards over the years, but she still gets VERY excited when she wins big, as evident from her backstage freak out at the Grammys on Monday night.

Swift had just won best pop vocal album, and while in her dressing room with BFF Selena Gomez and a few other pals, she learned that "Bad Blood" won a Grammy award for best music video. T. Swizzle posted a video of the ladies freaking out in their dressing room and tweeted, "Bad Blood just won a Grammy for Best Music Video and we are not ok." As you know, Selena stars in the music video, and the ladies have grown closer than ever over the last year.

Swift accepted the award via phone call, and pal/collaborator Jack Antonoff served as a go-between for Swift and the audience. Earlier in the afternoon the ladies struck a pose on the red carpet, and they looked gorgeous in dramatically different ensembles. Selena wore a sparkly Calvin Klein Collection cut out dress and Giuseppe Zanotti shoes while Taylor wore a bold midriff-baring Atelier Versace dress and Stuart Weitzman shoes.

Swift is up for seven awards tonight ... wonder how many more she'll win?

Bad Blood just won a Grammy for Best Music Video and we are not ok.@selenagomez pic.twitter.com/EquWAq0UPg

— Taylor Swift (@taylorswift13) February 15, 2016

Did he give the supermodel the boot? It appears that way!

Harry Styles hit up Clive Davis' pre-Grammys party this weekend, and we caught him leaving the bash with a mystery girl that most definitely isn't Kendall Jenner! Something tells us the One Direction star kicked her to the curb, because he was getting mighty close with this chick. They even left in the same car!

The British heartthrob and Kim Kardashian's little sister haven't really hung out that much since they went on a romantic Caribbean vacation together over Christmas, and it sounds like poor Kenny might just be the girl that's expecting too much from the guy that wants to keep it casual.

"At this point in her life, Kendall is ready for a serious relationship. She thought she could just go with the flow with Harry, but it’s just not making her happy. Harry is too loosey-goosey for her," a source dished to Hollywood Life.

"It’s pretty much what happened the first time around for them; Kendall wanted more and Harry wasn’t ready to fully commit. They aren’t on bad terms or anything, but Kendall isn’t going to wait around for Harry to make the next move, which would be to make a serious commitment and follow up with concrete actions. She wants a guy who’s going to walk the walk," the source added.

Another person he's pretty done with? Zayn Malik, who was at the same party! We wonder if the two were cordial and chatted briefly, or whether they avoided each other all night!