SHATTERED DREW'S BOOZE NIGHTMARE

Bestie Cameron Diaz staged intervention to help her sober up

DEVASTATED Drew Barrymore crawled into a bottle and plunged into a dark depression as her world collapsed after a heartbreaking divorce — and things got so ugly even her therapist walked out!

Now Drew’s bestie, Charlie’s Angels co-star Cameron Diaz, is dishing on the 50 First Dates beauty’s terrible tailspin, saying it “was difficult to watch.”

In fact, Drew’s boozing was so bad she adamantly refused to stop, so her therapist Barry Michaels walked out, telling the star: “I can’t do this anymore,” the TV talk show host recalls.