Kelly Osbourne has admitted getting drunk on a plane to Atlanta.

The TV star has previously spent time in rehab, most recently in 2009 when she was treated for an addiction to painkillers.

Due to her past battle with substances, much was made of her alcohol consumption on the recent flight.

Kelly spoke candidly about her breakdown onboard the plane and her reasons for "losing it".

The episode was caused by her heartbreak following her brother Jack's recent diagnosis with multiple sclerosis.

"The first thing I want to say is the only reason I'm being so honest and telling you what happened is because I don't think it's fair for me to lie. I'm not going to say I didn't do something when I did it," Kelly admitted to RadarOnline. "I got drunk on the plane to Atlanta.

"Before I got on the plane a gentleman came up to me and asked me how my brother was doing and told me about his brother having MS and directed me towards a website.

"On the plane I started looking at the website. It described how bad certain cases of MS got, and it made me lose it because I've sat through my mother having breast cancer, my dad almost dying from a bike accident, and now it's my brother who's my best friend."

Kelly has previously denied the claims that on June 19 she had consumed so much alcohol during the four-hour flight that she was mumbling and her make-up was a mess.

She says the episode was worsened because she had an empty stomach when she began drinking.

Despite her past treatment, Kelly admits consuming alcohol at times. She insists she is not a crazy drunk person.

"I have not lied about it. I have the occasional drink. I will never lie about that. That's my choice that I make and I'm an adult and I have to be responsible for my actions", Kelly said.

"But it's not like I was f**king claiming there was a colonial woman on the wing. Like I was so out of it they had to land the plane or something. I got drunk on a plane, big deal." (C) Cover Media