Veteran actress and glamazon Joan Collins has issued a warning to pop singer Rihanna. The five-times-married ‘Dynasty’ star (who’s current husband is 32 years her junior) has proffered some relationship advice, warning the ‘Umbrella’ singer not to return to her boyfriend Chris Brown, who allegedly assaulted her earlier this year. Joan says, “I made a few mistakes but one of the things that I would say to a girl like Rihanna is, never go back to a man who hits you. Never, ever. Any man who hits you once will hit you again. No man has ever hit me. I wouldn’t tolerate it for a second.”