The 21-year-old and her on and off boyfriend have called time on their relationship once again and the "Baby" hitmaker has posted a number of photographs on Instagram with Ventura, who is rumoured to be his new girlfriend, but Gomez isn't bothered about their romance, reports femalefirst.co.uk.
"Selena doesn't care who Justin is dating. All she knows is she's done with him and his immature behaviour. He's all talk and no action," said a source.
According to sources, Bieber and Ventura recently looked cosy together in Las Vegas.
Bieber was previously linked to Gomez's former friend Kylie Jenner.
The source added: "If he wants to date (a) teenager like Kylie or a wannabe model, then let him. She's done and moving on from the broken promises and drama."