Diana Ross sings "Happy Birthday" to Beyoncé during the Los Angeles stop of her Renaissance tour

Beyoncé celebrated her 42nd birthday on stage in Los Angeles on Monday in front of a star-studded audience. Diana Ross appeared on stage at SoFi Stadium to sing "Happy Birthday," which brought Beyoncé to tears.

"Thank you so much. You are so amazing. This is the legendary Diana Ross," Beyoncé told the crowd. In 2019, the roles were reversed when Beyoncé sang "Happy Birthday" to Ross at her 75th birthday, Entertainment Tonight reports.

Several audience members at Monday's concert – including stars like Kim Kardashian – captured the moment on video and shared it on social media.