Rihanna's father was ejected from the singer's recent charity ball after showing up to the event drunk.

Ronald Fenty has revealed the Umbrella star paid for him to enrol in rehab in Malibu, California last year (14) in a bid to help him kick his longtime drinking problem for good, but he suffered a relapse on the day of her Diamond Ball charity gala in Beverly Hills last week (ends14Dec14).

Fenty has now revealed he was removed by security at the start of the event and did not even get to see his daughter on her big night. Photographs on the red carpet show him drunkenly posing with members of his family but he is not present once Rihanna joins the group.

He tells Dailymail.co.uk, "I had Johnny Walker Black (whiskey). I had two doubles man and tripped over a chair. I had been on the (red) carpet for the pictures, I meet a couple of famous people I knew, go and talked with them, and then somebody left a chair and I stepped back and fell over, I saw my ex (Monica, Rihanna's mother) look up, and within a few minutes after the picture was taken, security came up and said, 'We're taking you home'. I said 'But I haven't seen my daughter yet' and they said 'Don't matter man... Please do not make a scene it will reflect on your daughter'...

"I'm sad how it ended of course, I should have never taken that first drink or any drink for that matter... I guess she would be angry with me. I think she is, I'm not sure, we haven't spoken just yet... That day of the event I was really down... I got really down and depressed and that was basically why I started drinking that day."

Fenty goes on to explain how Rihanna paid for him to enter rehab in November, 2013 after he had a brush with the law, and he now feels like he let her down.

He explains, "It was a good thing and I was off the alcohol for a long time. She came to visit and we talked... She was happy to see me, said she was very proud of me at the time... I don't see myself as an alcoholic, I don't realise when I get that drunk. Call me a drunk or alcoholic in denial, whatever you want to call me but I have realised I could drink or not drink. I only start (started) drinking, once I come back here in December... I feel bad because I let her down because she spend (sic) all that money putting me in rehab, (and) then find me (sic) drunk somewhere. It is not good. What can I say but I'm sorry. It's me who f**ed up."