Kelly Osbourne has revealed she was drinking three bottles of champagne and 24 cans of alcoholic seltzer water a day during her recent relapse.
The TV personality quit drinking alcohol and taking drugs in 2017 but in April this year revealed that she had relapsed after four years of sobriety.
Speaking on the Kelly Osbourne and Jeff Beacher Show podcast, she said: "I went away somewhere with my friend and people were by a pool and they were drinking champagne.
"It was like, 'I can have a glass of that'. And I had a glass and I was fine. Walked away from it, didn’t have another one again for a couple of weeks, didn’t even think about it.
“And then I was out with my friends and I was like, ‘I’m going to have a drink, I’m fine.’ I had two drinks and I was fine.”
"But it went from having one drink here, one drink there to literally three bottles of champagne and 24 White Claws a day,” she added.
In April, the reality TV star told her fans on Instagram that she had relapsed.
In her post, the 36-year old said: "Hey guys, so this is a little hard for me to talk about but I've always promised you that I'd always be honest with you about where I'm at and what's going on with my road to recovery.
"I relapsed. I'm not proud of it but I am back on track and I will be doing a podcast this week where I tell everyone about what's going on and what happened.
"I just want to let you know that I am sober today and I'm going to be sober tomorrow but I've learned it truly is just one day at a time and I just wanted to tell you guys the truth because I never ever want to lie to you.
“Thank you so much for your support and your love and you'll be hearing from me soon."
Osbourne’s brother Jack has struggled with addiction too but recently celebrated 18 years of sobriety.
Their father, Black Sabbath rocker Ozzy, has also had a well-documented battle with addiction, but is now around seven years sober himself.
Watch: Kelly Osbourne says weight loss surgery gave her a chance