The Boy George vs. Vince Neil war on 'Celebrity Apprentice' was VERY REAL and almost came to blows on set ... so says Chael Sonnen.
The MMA legend (and 'Celeb Apprentice' co-star) joined the guys on the "TMZ Sports" TV show on FS1 and told us it all went down when George (a recovering alcoholic) confronted Vince for drinking wine in the studio during a challenge and Vince didn't take kindly to it.
"Those guys had real-life heat," Sonnen said ... "They had a real life confrontation.