Justin Bieber 22nd Birthday Bash Mingles Girlfriends Kourtney Kardashian, Hailey Baldwin, Kylie Jenner, Adrienne Bailon

Justin Bieber is celebrating his 22nd birthday soon, and just to make sure that the Biebs was in the birthday mood, he gave himself a big bash and invited a variety of his gal pals, from Kourtney Kardashian to Hailey Baldwin, therefore lighting up rumors that he’s rekindling his romance with the Keeping Up with the Kardashians star. Tuesday marks his official birthday, but the Saturday night party definitely served to amp up the party mood for Beliebers, reported the Daily Mail.

Kourtney came accompanied by sister Kylie Jenner, but the companionship of her sister didn’t halt hints that Kardashian was contemplating heating up that famous hook-up she enjoyed recently with the soon-to-be 22-year-old pop star. Hailey Baldwin surfaced as well, along with Ashley Benson, Joe Jonas, and The Game.

Kourtney Kardashian and Kylie Jenner attended Justin Bieber's birthday party. Kourtney Kardashian and Kylie Jenner attended Justin Bieber’s birthday party. [Photo by Frazer Harrison/Getty Images]Among those celebrating at the birthday bash, Diddy gave Justin a Bad Boy jacket while the Ciroc vodka flowed freely, reported Hollywood Life.

Just to add to the excitement, the Biebs took off his shirt prior to donning the Bad Boy letterman jacket Diddy. But as to hints that he and Kourtney are rekindling their romance? The only clue that Kardashian will provide is her decision to make a public appearance at his birthday celebration.

Although guests were requested not to take photos, they also were advised to utilize the hashtag #JB22, and as a result, pictures of the party circulated widely, including the shirtless wonder.

Protected by two bodyguards, Bieber delighted his guests with a rendition of “Sorry.”

But what about Hailey Baldwin? She did make her presence known but wasn’t seen in an embrace from the birthday boy, who was wrapping his arms around various gals throughout the enchanted evening.

However, Hailey herself has shared that she and the Biebs are not “exclusive,” reported Contact Music.

And Justin clarified his own position on love, whether it’s Baldwin or Kourtney.

“I don’t want to put anyone in a position where they feel like I’m only theirs, only to be hurt in the end. Right now in my life, I don’t want to be held down by anything. I already have a lot that I have to commit to. A lot of responsibilities. I don’t want to feel like the girl I love is an added responsibility.”

That leaves Kourtney, who has been rumored for months to be hooking up with the pop idol.

Kendall and Kylie Jenner pose with big sister Kourtney Kardashian. Kendall and Kylie Jenner pose with big sister Kourtney Kardashian. [Photo by Chris Weeks/Getty Images for Calvin Klein]In December, sources confirmed to Us Weekly that Kardashian was enjoying a romantic fling with Justin. But neither will publicly admit it.

Kourtney did pose for a photo at his birthday bash, however, showing she had no worries about sharing her presence at the party.

As the Inquisitr reported, however, Kardashian recently reunited with him at the private Grammys after-party held to celebrate Bieber’s first-ever Grammy win.

And that wasn’t the only surprising reunion featuring Kourtney. Kardashian revealed that she, Kylie Jenner, and Adrienne Bailon are friends once again after a falling-out when Bailon and their brother Rob Kardashian broke up.

Kardashian and Bailon posed along with Kylie for a photo showing their reconciliation, reported People.

Kourtney and Kylie had avoided Rob’s ex after he split from Bailon. But their photos and captions made it clear that they’ve forgiven, if not forgotten.

“Cause we are sistersss,” read one of the captions that the sisters both posted of their reunion, referring to the Cheetah Girls’ song.

Almost seven years have passed since Rob and Adrienne were an item. She infuriated the Kardashian clan by claiming that it stained her career. However, now Bailon has changed her mind, referring to Rob as a “great guy.”

[Photo by Dimitrios Kambouris/Getty Images]