The last time Katy Brand performed a live show was at the 2005 Edinburgh Fringe. It’s a somewhat different set-up as she embarks on her first UK tour this week. “I wasn’t planning to make my own set this time round,” she deadpans, “and hopefully I won’t lose quite as much money.”

As befits a comic who now has three series of an ITV2 comedy show under her belt, as well as a British Comedy Award for Best Female Newcomer, rather more time and money has been poured into Katy Brand’s Big Ass Tour than 2005’s Celebrities Are Gods. It continues her original theme, however, with more mockery of pop culture figures such as Rhianna, with her nonsensical lyrics about umbrellas and Nigella Lawson and her X-rated cookery.

It all stems, she says, from a desire to pop the PR bubble many famous people exist within. “I’m mainly interested in those who are pompous or pretentious or who have a very strong PR agenda that doesn’t ring true,” she adds. Hence her Kate Winslet, who is constantly insisting she’s “just a normal person” and pop star Lily Allen being re-cast as a paramedic who’s more interested in posting on Twitter than attending to her patients. “People always suggest I do Jordan but there’s no point because she’s not pretentious,” says Brand. “There’s no joke really in mocking someone for getting their boobs out when they’re totally upfront about it anyway.”

In her TV show, Brand has spoofed scores of “slebs”, going to extraordinary lengths in certain instances – her reinvention as Pet Shop Boy Neil Tennant, complete with bald cap, took three hours in make-up. How does that sort of preparation fit within the constraints of a live show? “I’ve got a great costume designer!” Brand explains. “I told her I needed to go from Lady Gaga to the Queen in less than 30 seconds and although she was a little nervous, she’s managed it.”

Fans will be treated to a pick ’n’ mix of the 31-year-old’s favourite characters and songs from the past few years, as well as some new material. She’ll also perform a version of the Beyoncé Single Ladies dance that saw her win second place on the BBC’s Let’s Dance for Sport Relief earlier this year. Although seen shaking her booty with confidence up on stage, it was a different story beforehand. “I was incredibly nervous because it was live in front of millions of people – you’ve only got a few minutes to get it right or totally wrong.” In the end Brand lost out on the main prize to fellow comic Rufus Hound as Cheryl Cole, but she quips: “I was happy with second place. The best woman won.”

Brand is aware there is limited mileage in celebrity culture and has been adding strings to her bow recently with a new, “more music-based” show and work on films, an area she’d like to explore further. She recently had a role in Nanny McPhee, with Emma Thompson. “I was relieved I hadn’t done her [Emma Thompson] on the show,” she admits. “She’s not a pretentious person, so there wouldn’t have been any reason to, but still. It’s always awkward when you do meet people you’ve spoofed. You never know how they will react.”

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