Britney Spears admits regret over song Oops!... I Did It Again: we look at other celebrity show disappointment

Who doesn't have regrets? Most of us though would keep these as secret nuggets for waking up during the night in a cold sweat or for long train journeys where your face contorts into a grimace as you recall said unfortunate series of events.

The ever-candid Britney Spears is using her Instagram account as a confessional box as she goes from images and video of herself wearing... not much... to then pictures of a kitten or an old photograph from The Theatre, A Monthly Review, Volume IX, January to June, 1887, Carson & Comerford, London, 1887. Yes, it's varied.

Britney has added to her Instagram curation by saying that she wasn't happy with the version of Oops!... I Did It Again, which was released in 2000.

It has been six years since her last live performance and the 41-year-old pop star provided her more than 41.6 million Instagram followers a rare video of her singing.

'Most of this sounds pretty flat … but I liked DOING IT AGAIN,' the Grammy winner captioned the recording, which featured just her vocals as the camera pointed to the ceiling.

In September, she confessed that she may never perform live again and claimed she is 'traumatised for life' after being humiliated into working with the 'tiniest' backup dancers while on tour.

'I’m pretty traumatised for life and yes I’m pissed as f*** and no I won’t probably perform again just because I’m stubborn and I will make my point,' she wrote on Instagram.

We look at other celebrities who regret certain key moments of their performances...

Miley Cyrus

The singer regrets ever making 'Wrecking Ball'. Who could forget Miley Cyrus’s iconic music video. You know, the one where she swung naked on a giant wrecking ball. As it turns out, that’s a move she wish she never made.

She explained on the Zach Sang Show: "Swinging around naked on a wrecking ball lives forever. I’m never living that down. I will always be the naked girl on a wrecking ball… My worst nightmare is that being played at my funeral."

Viola Davis

Viola Davis was nominated for an Oscar for The Help. Yet, the actor deeply regretted playing the maid Aibileen Clark, saying her character’s voice is not heard enough in the final film. "Have I ever done roles that I've regretted? I have, and The Help is on that list," she told The New York Times. "I want to know what it feels like to work for white people and to bring up children in 1963, I want to hear how you really feel about it. I never heard that in the course of the movie.”

Katherine Heigl

Knocked Up remains one of Katherine Heigl’s best-known roles, despite the actor having said she found the whole thing “a little sexist". "It paints the women as shrews, as humourless and uptight, and it paints the men as lovable, goofy, fun-loving guys,” she told Vanity Fair. "It exaggerated the characters, and I had a hard time with it, on some days."

Idris Elba

Few people knew who Idris Elba was before The Wire. Despite the acclaim that came from playing Stringer Bell on the hugely popular crime show, Elba has some regrets. "We're all idolising Stringer Bell, but who are we really idolising?" he asked David Lammy while appearing on James O’Brien’s podcast. "Are we idolising a smart drug dealer or a dumb narcotics dealer? What are we saying here? Is it OK to pump a community full of heroin but because you're smart at it, that makes you cool? That was a problem for me."

Harrison Ford

There are famously seven cuts of Blade Runner. One of those features Harrison Ford’s character, Rick Deckard, narrating scenes. Another – the one director Ridley Scott approves of – is bleaker and does not have Deckard explaining events. Ford does not care for either version. "I didn't like the movie one way or the other, with or without,” he said in 2017, before the release of Blade Runner 2049. “I played a detective who did not have any detecting to do. In terms of how I related to the material, I found it very difficult. There was stuff that was going on that was really nuts."

Robert Pattison

Most actors who regret taking on roles would wait a few years until publicly bemoaning their experience on set. Not Robert Pattinson. Before the final Twilight film was in cinemas, the actor said of playing the vampire heartthrob Edward Cullen: "It’s weird kind of representing something you don't particularly like." A few weeks later, he added how he would have “mindlessly hated" the series had he not appeared in it.