Diana Ross wasn't sure about disco. At least until she did a disco track and scored in a major way with "Love Hangover".

Ross — her light-touch voice a breathy beauty — hasn’t sounded this good in decades. The one new song here, the single ”I Love You (That’s All That Really Matters),” isn’t any kind of classic, but it ...

After the guest performance, Beyoncé ran across the stage to join Ross, where she could be seen telling Ross “I love you so much” before sharing a hug. It was Beyoncé running on stage to give Diana ...