Justin Bieber and Chantel Jeffries have a long history together and just this past weekend, Justin and Chantel posted Instagram photos, in which they were seen getting very close (and being joined by a model friend of Chantel's)
Needless to say, Bieber's girlfriend Selena Gomez was none too pleased by the pics and sources close to the couple say things got ugly when Selena confronted Justin about his flirtatious ways.
"He did what he always does and got super defensive - now they're not talking and Selena is hysterical, " says an unidentified friend of Selena's. "Seeing Justin with other girsl is horrible for her. It's driving her crazy.
"She doesn't understand why he does this to her and she doesn't know what to do. He's got her questioning everything."
Selena and Justin got back together just weeks ago after years of on-again, off-again drama.
Insiders say Selena is well aware that Justin is far from the ideal boyfriend, but she can't seem to get over her feelings for the troubled pop star:
"She doesn't trust him, but she can't give up on him because she doesn't feel like she can live without him," says one source. "She's miserable, but she doesn't want anyone to know how upset she is, especially Justin."
Justin has exerted his bad influence on Selena throughout their relationship. According to some reports - most recently, Bieber and Gomez were spotted doing cocaine in a nightclub shortly after their reconciliation.
Needless to say, many fans and friends are eager to see Selena cut Justin loose.