We can't imagine.

Ariana Grande was noticeably missing at the Mac Miller tribute concert in LA last night, and apparently the songstress just couldn't bring herself to attend, as she's still highly emotional following her ex's tragic death in September.

"[Mac's death] is still too painful for Ariana. She is still deeply grieving and chose to pay respect in her own way,” a source dished to Radar.

The pop star is throwing herself into work to cope with the loss.

"Ariana is now focusing her time and energy on her music and upcoming tour, which she is very excited about. It’s what Mac would want,” the source added.

The chart topper paid tribute in her own way, by wearing her deceased love's hoodie and cuddling his dog Myron, who she took in after his passing.

So sad!

We miss you Mac! :( fly high angel// Ari wearing Mac's hoodie! I don't know if it exactly is his but it is the same

A post shared by Smile :) (@arisguardianangel) on Nov 1, 2018 at 1:55am PDT

This would be cute if we didn't know what a d-bag he really was!

Tristan Thompson posted this pic of himself with Khloe Kardashian and daughter True on Halloween, and it seems he convinced the reality star to bring their little girl to Cleveland for the holiday.

The couple's relationship has been hanging by a thread ever since he cheated on her with multiple women just days before she gave birth, and it sounds like there's still major issues between them.

"Khloé’s relationship with Tristan isn’t on solid ground and hasn’t been for a while. Tristan isn’t happy that all of the cheating is going to play out on Keeping Up With the Kardashians after the scandal has already made his life miserable," a source dished to Us Weekly. He has nobody to blame but himself!

"Khloé is just going to sit back and assess the situation very closely. She isn’t ready to close the door on the relationship, but Khloé is also realistic about the issues facing the relationship. Khloe's world won’t fall apart if the relationship with Tristan ends,” the source added.

Just kick him to the curb, Khlo!

A post shared by Beyoncé (@beyonce) on Nov 1, 2018 at 2:04am PDT

Spot on!

Beyonce and Jay-Z went as Olympic athletes Florence Griffith Joyner and Tommie Smith for Halloween, and they certainly made a statement!

In case you didn't know, Joyner was a black track and field star who famously set set the world records for the 100m and 200m. Smith, meanwhile, threw up his fist in a black power salute at the 1968 Olympic Games in Mexico City, causing quite the controversy at the time.

The couple didn't give us a peek at Blue Ivy or twins Rumi and Sir's costumes, but we bet they were epic!

A post shared by Beyoncé (@beyonce) on Nov 1, 2018 at 2:04am PDT

My how times have changed!

While the rest of the world was out celebrating Halloween last night, Justin Bieber and Hailey Baldwin were getting their prayer on at church in LA. Talk about an old, boring married couple!

Speaking of which, they are indeed hitched, but they're trying to keep things on the down-low for a while longer.

"Justin and Hailey are legally married, but Justin is telling friends he isn't planning on wearing a wedding band for a while. As much as Hailey and Justin are public about their relationship, they are trying not to make a spectacle of it, and that is why they kept their marriage under wraps and got engaged without telling anyone," a source dished to ET.

"The couple kept their marriage a secret from a lot of people. They still plan to have a more formal wedding, but for them, this intimate ceremony was exactly what they wanted," the source added.

Is it bad that we miss the days of wild JB?!

Where were their costumes?

Jennifer Garner and Ben Affleck took their three kids trick-or-treating in Malibu last night, and if you didn't know better, you'd think they were just your average cute couple and family. The actress was in a great mood and beamed at her former hubby throughout the evening, and we guess it is possible to be close after a divorce.

The Peppermint star has been quietly dating businessman John Miller for about six months now, and according to insiders their romance is getting "serious."

"John has all the qualities Jen’s looking for in a man. He’s the ultimate Prince Charming," a source dished to In Touch.

That said, apparently the mother-of-three's loved ones want her to proceed with caution, as Miller has a lot more to gain from their relationship than she does.

"He’s an entrepreneur and being attached to one of the most famous actresses in Hollywood is a surefire shot to instant fame. He’s already being Googled and one of his companies, CaliBurger, is being buzzed about, so this is a win-win situation for John — and a risky romance for her," the source added.

We wonder if Ben ever regrets letting her go?

They always go all out!

The KarJenner clan pulled out all the stops for Halloween this year, and we're giving the award to Kimmy K and her Pamela Anderson costume!

KKW got herself into MAJOR trouble, though, by calling her friends the R-word when they couldn't guess who she was dressed as, prompting her to issue an apology for using the offensive word.

"I want to apologize for what I said in a recent video post that is inappropriate and insensitive to the special needs community. I try to learn from my mistakes and this is one of those times. Please know that my intention is always pure, and in this case, it was a mistake. I’m sorry," she told TMZ.

Kourtney donned a pink dress, thigh high boots and a long ponytail to go as Ariana Grande, and the "Sweetener" songstress approved, as she gave her pic a like on Instagram! Kris Jenner got suited up as Cleopatra, while Saint and Reign went as Kanye and Lil Pump in the "I Love It" video.

Kylie and her pals, meanwhile, put on tight colorful latex dresses and went as Fanta girls, but if it wasn't Halloween we'd just assume this was their normal clothing.

We want to know what Caitlyn Jenner and 'Ye dressed up as!

They really went all out!

It's officially Halloween, so you know what that means.... celeb costume time! While we'll have to wait until tonight to see more, a few of our favorite stars have already given us a peek at their looks, and they did not disappoint!

Beyonce donned a cropped wig and went as "Phony Braxton," which if you don't follow, is a play on Toni Braxton. Kylie Jenner made herself up as Barbie, while Khloe and daughter True dressed up as adorable tigers, complete with a painted face for the reality star.

Mariah Carey and boyfriend Bryan Tanaka did a cute couple's theme and went as a doctor and a nurse, while Nicole Kidman and Keith Urban were a ninja and a kitty cat.

Giuliana and Bill Rancic did their best Bradley Cooper and Lady Gaga in A Star is Born, while Pink and her son Jameson were pirates. Our favorite? Lisa Rinna as her Real Housewives of Beverly Hills co-star Erica Jayne!

We really just want to know what Kim Kardashian is going to be!

Ugh we were so hopeful she was going to kick him to the curb!

Khloe Kardashian is reportedly making a "last ditch effort" to save her relationship with Tristan Thompson for her daughter's sake, which is why she flew all the way to Cleveland last night to be in the stands at his basketball game on Tuesday.

"On one hand, she knows that Tristan is a cheater, and that he will probably always be a cheater. She has a hard time believing that he will ever really be faithful to her,” a source dished to Radar.

"On the other hand, Khloe wants nothing more than to have this perfect little family, and she thinks True needs to have a father in her life. Everyone knows it’s inevitable she will end it eventually," the source added.

Their romance has been up in the air ever since April, when he was caught cheating on her with multiple women just days before she gave birth. It's no secret that the K clan aren't his biggest fans, but they're doing their best to keep their opinions to themselves as the Revenge Body star contemplates their future.

Just dump him, Khlo!