Diana Ross is always cool under pressure, even when a drunken fan storms the stage and starts dancing! (Yep, that happened.)

While performing at a firm’s annual investor conference at Rockefeller Center this week, a guest in a suit jumped onstage and threw his hands in the air, really feeling the music. And we mean really feeling it.

Of course, Diana handled it like a pro and smiled and spun away. See for yourself: