10. Fearne Cotton
As seen on... The Xtra Factor, Guilty Pleasures, Top of the Pops, Love Island and many more
Why so annoying? It's part and parcel of a presenter's job to appear excited about whatever show they happen to be fronting - but Fearne's boundless enthusiasm can get a tad trying at times. Nowhere was this more apparent than during her stint on The Xtra Factor, during which she'd feign wide-eyed amazement at her interviewees while appearing oblivious to their plight. An example? Every week, Fearne would bound on to the stage seconds after another wannabe had been voted off The X Factor, and screech something along the lines of: "So Andy's dream lie in tatters and he'll have to go back to laying asbestos for a living. Hey mate, come over here and tell us all how you're feeling..."
In Fearne's defence... She did manage to annoy Louis Walsh and Simon Cowell while filming The Xtra Factor. And if anyone's worth annoying, it's those two...