Gomez, 20, is said to be partying with ex-boyfriend's friends to purposely annoy him, reported Radar online.
"Justin's friends look at Selena like a celebrity, so they still want to keep that connection - despite Justin being hurt by her. She purposely continues to associate with them just to annoy Justin," a source said.
Aspiring rapper King Kevi of Bieber's entourage was recently caught leaving Gomez's house late night, leading to romance rumours between the two.