SHIRLEY MacLAINE

The Terms Of Endearment star insists she has led a drug-free existence, with the exception of smoking marijuana one time and eating some cannabis-laced "bang brownies" late actor Robert Mitchum gave her on another occasion.

So MacLaine, 73, had no idea she was adding a small fortune in cocaine to her coffee at the posh event.

In her new memoir Sage-ing While Age-ing, she recalls, "At a fancy dinner party in Hollywood, I put a teaspoon of what I thought was very refined sugar in my demitasse coffee.

"The hostess was horrified because is was $1,000 dollars' worth of coke. I didn't drink the coffee and I was never invited back."

MacLaine tells WENN, "I thought it was Sweet n' Low... That's not something that restaurants serve.

Source: WENN