In mid-August, the "Sorry" singer, 22, berated his fans for making negative comments towards his new girlfriend, and his ex Selena Gomez also waded into the mix.
The on-and-off exes got into a spat when Gomez left some advice for her ex on a photo he posted of himself and Richie.
"If you can't handle the hate, then stop posting pictures of your girlfriend lol- It should be special between you two only," Gomez wrote. "Don't be mad at your fans. They love you and supported you before any one ever did." Bieber quickly clapped back, writing "It's funny to see people that used me for attention and still try to point the finger this way. Sad. All love."
In a recent interview with Billboard, Richie, 18, opened up about falling for Bieber.
"We have a special relationship. Justin is very easy to talk to, and that's hard to find with people in Los Angeles," she said.
While a source previously told WHO the duo were "basically on a love-fest," the pop star was also not ready to get serious with Richie.
"These girls all go crazy for him, but he's not settling down. It's virtually impossible where he's at in his life and career for anything to last with these girls," said the source.
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