“Kourtney is having a fun holiday weekend with her kids. She keeps enjoying the beach and the pool. She has been hanging out with friends, including Justin Bieber and Larsa Pippen,” a source tells PEOPLE.
The source adds that Kardashian is staying at The Setai hotel in Miami with her three children with ex Scott Disick: daughter Penelope, 3, and sons Mason, 6, and Reign, 1. Bieber, meanwhile, is in town for the Miami leg of his Purpose World Tour.
The 37-year-old reality star and the 22-year-old singer have reportedly crossed paths multiple times over the weekend, but they appeared to be keeping their distance during a night out at LIV night club on Saturday.
“They weren’t together. At LIV he sat in a skybox. She sat in DJ booth,” another source tells PEOPLE. “He didn’t stay long on both nights and kept to himself – no mic or performance.”
But on Sunday night, Bieber and Kardashian were spotted together at STORY Nightclub for his Purpose World Tour after party. Bieber arrived at 12:30 a.m. and immediately jumped on the mic and got the whole crowd to sing “Happy Birthday” to STORY owner David Grutman. The pop star then danced along to several of his songs.
At around 1 a.m. Bieber disappeared for a few minutes and then returned to the DJ booth with Kardashian in tow, a source tells PEOPLE.
Kourtney “was there for David’s birthday,” another source says. “At first Justin didn’t pay any attention to her, but after wishing David a happy birthday he went right down to her table and brought her up to a private table behind the DJ booth.”
Kardashian, who was wearing a tight leather mini dress and thigh-high lace-up Tom Ford boots, was joined by close pals Larsa Pippen, the wife of retired NBA star Scottie Pippen, and Jonathan Cheban. Kardashian’s friends danced at a table while she was seen singing along to Bieber’s songs, the source says.
Earlier on Sunday Bieber met Pretty Little Liars star Ashley Benson for a meal at Miami’s Wynwood Diner.
“He jumped out of a black SUV and quickly entered Wynwood Diner in a long checkered T-shirt,” a source tells PEOPLE. “After a busy weekend, he wanted nothing more than some scrambled eggs and toast, in true Miami style.”
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Another source told PEOPLE in April that Bieber and Kardashian had reportedly been “hooking up on and off for a few months now.” Before their Miami reunion, the pair hadn’t been spotted together since late March, following the Los Angeles leg of Bieber’s Purpose tour.
“They have hooked up a few times, including recently. It happens in L.A. He has met her kids, but they don’t hook up around the kids,” the source said in April. “It’s on nights when she has help and is able to go out.”
“Kourtney is great. Justin thinks it’s cool that she is older and hot. She isn’t clingy and has her own life,” the source continued. “There are no bad consequences for Justin to hook up with her. She is very easy going and just makes it fun for him to be around her.”
• Reporting by BECKY RANDEL, LINDA MARX and PERNILLA CEDENHEIM