The TV star can't stand people with poor personal hygiene, and admits she had a torturous taxi ride with a driver with bad habits.
She tweeted: "In a taxi and the driver keeps licking and sucking his teeth and it's making me SICK and putting me in the worst mood."
The 25-year-old blonde - who mainly lives in Los Angeles - is currently in London and admits it's great to be back in her native country.
Kelly - who was born in London, but travelled around as a child on tour with her rocker father Ozzy Osbourne and mother Sharon, who worked as Ozzy's manager - revealed in other twitter posts: "I am having the best time in london i really dont want to go back to LA next week!
"im so happy to be back. even with the bad weather. there is no place like home!!!! (sic)"