Diana Ross laughed off a drunken fan who stormed the stage dancing when she performed at a firm’s annual investor conference at Rockefeller Center on Monday.

Video seen by Page Six shows a seemingly overserved guest in a suit jumping onstage and throwing his hands in the air, swaying back and forth and getting uncomfortably close to the “Reach Out and Touch (Somebody’s Hand)” singer.

But Ross handled it like a pro, smiling and spinning away. Someone finally intervened and ushered the guy off the stage as he kept dancing.

“It didn’t seem like [Ross], or the conference, had much security,” said a witness.

Ross has recently been subjected to other freaky behavior from fans. In March, we reported that a drag queen called HRH Princess Diandra was in the crowd at a Ross show and began poking and flipping off the legend at the Edition hotel in Times Square. Ross attempted to slap away Diandra’s hand and scolded the rowdy fan before she was briskly bounced by security.

Diandra claimed it was due to booze, later commenting online: “Super excited and fueled with Champagne, a toxic combination!”