G-Eazy and Halsey‘s split may have an added element of drama: a hookup with an ex. “I learned recently it’s OK to be alone! Being alone is enough,” Halsey, 23, told the crowd at her Borgata performance in Atlantic City over the weekend. “The second lesson I learned is don’t sleep with your ex.” The “Colors” singer didn’t indicate if she was referring to G-Eazy, 29, but given her recent bout of tears onstage, it seems she was heartbroken by the breakup, which was initially blamed on conflicting schedules.