The singer gave a handful of relationship tips during her shows in Atlantic City over the weekend, including "Don't sleep with your ex," and "You don't belong to anyone but yourself."
While she didn't outright name ex-BF G-Eazy, the remarks come just after Halsey not-so-subtly called the singer a cheater.
She also didn't offer up anymore explanation into the situation.
Halsey continued opening herself up to the crowd the following night in Virginia asking who in the audience was single. She quipped, "Good for you," after seeing the hands raised, and after asking who was in a relationship, told her fans to "get a room ... we all can't be so fortunate."
The 23-year-old has been working through her split onstage since the public breakup. Halsey broke down in tears at her first show last weekend during "Sorry."