Beyoncé sings for Diana Ross at her 75th birthday party

Beyoncé is Beyoncé. And because Beyoncé is Beyoncé, she can hold on to the mic for as long as she wants. There are few people Beyoncé has to take the mic for and pass the mic to. One of those people would be Diana Ross. Diana Ross performing her own birthday celebration at the Grammys six weeks b...