There has been talk that Sel told Justin that he's the reason why she's hooking up with Niall. Reports online say that Bieber is angry and jealous of the relationship. A "source" told Hollywoodlife.com, "[Gomez] begged him not to be angry at Niall... and that had she been in a committed relationship with [Bieber] this never would have happened in the first place."
As much as we could totally see that whole convo going down, our friends at GossipCop.com are shutting it down. A source told them that no such conversation between Selener and Bieber ever took place. The two exes are on friendly terms. As far as Sel telling JB he should have been more "committed" to her, and they were told it "never happened."
All of this comes, of course, after Selena and Niall were caught hooking up last weekend in Hollywood at Jenna Dewan Tatum's birthday party. Justin hasn't said anything about all that, but did post a throwback picture of him and Selena on Instagram shortly after the news broke.