The pop star spent the weekend in the U.K. with aspiring model Bronte Blampied, who also hung out with his group during a recent vacation in Hawaii (where he was rumored to be hooking up with Sahara Ray).
“Every night, she went back to his luxury apartment,” says a source of Bieber, 22, and Blampied. “They looked like a couple, and she stayed over at his place.”
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Although there was no PDA while they were out and about, “she was with him the whole weekend and never left his side,” says the source.
The pair partied on Friday at Tape night club and stayed in Saturday night after visiting a spa together and attending the V festival, where Bieber performed.
“They were just very friendly together,” an onlooker in the club tells PEOPLE. “It was just the two of them at first in the VIP area, but then it became a crowd of around 30 all dancing together. Justin interacted with lots of other people when she was there. He was in a great mood.”
Last week, Bieber traveled to Japan for his Purpose World Tour with Richie, 17, and the pair were photographed holding hands and kissing in a park.
However, a source told PEOPLE “it’s virtually impossible where he’s at in his life and career for anything to last with these girls. He’s not settling down.”do