Donna Summer blacked out in the studio while recording monster disco hit NO MORE TEARS (ENOUGH IS ENOUGH) with Barbra Streisand after a night spent partying.

The I FEEL LOVE singer forgot she was scheduled for a studio date with Streisand and had a night of excess instead of preparing her voice.

She recalls, "I got a call at eight in the morning: 'You are at the studio.' I had to get up and I was tired and spent.

"We were holding a high note and I blacked out and fell off the stool. Barbra kept holding her note. She thought I was joking. She goes, 'Donna, are you OK?'"