Kelly Osbourne

Kelly Osbourne Credit: Kelly Osbourne at the Kerrang! Awards. (Getty Images)

Kelly Osbourne has explained her drunken antics on a flight last week from Los Angeles to Atlanta, saying she was distraught over thinking about brother Jack Osbourne's recent Multiple Sclerosis diagnosis.

"I got drunk on the plane to Atlanta. It was on an empty stomach, and 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," she told RadarOnline.com.

She continued: "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." 

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