Britney Spears shows off a mysterious red design on her buttock as she dances in a barely-there thong lace bodysuit

Britney Spears showed off a mysterious red design on her backside in a series of new clips she posted to Instagram in recent days.

Spears, 44, on Sunday shared a shot in which she was donning a one-piece black lingerie bodysuit as she appeared to be dancing in her home.

The Oops!…I Did It Again singer captioned Sunday's shot with icons of a dagger, the national flag of Japan and a nail polish emoji.   

Spears had her wavy blonde locks down as she rounded out her ensemble with black heels and black gloves in a series of recent social media posts.

The...Baby One More Time artist, who was seen earlier this month in New York City, captioned a previous shot in the series, 'Protect your heart.' 

The Daily Mail has reached out to representatives for Spears for further comment on the story. 

Spears had been seen in an earlier clip in which she danced to her 2001 track Lonely, as she opened up about dancing to her own tracks.

'I’m so confused … Is there a difference or different feeling when I dance to my songs and my voice!!!' Spears said. 'Hmmm.'

The singer took to the site after a one-time choreographer opened up about what it was like working with her 25 years back.

'Britney in 2001 was unstoppable,' dancer Brian Friedman, 49, told People about his experience working with the pop star.

Friedman, who worked on the choreography on Spears' dances for hits such as Toxic, Till the World Ends and I'm a Slave 4 U, called the entertainer 'the best of the best.'

Friedman, who chatted with the outlet at the Dancers Against Cancer annual Industry Dance Awards Wednesday, said that Spears 'was on top of the world, which is crazy to think that.

'She was 19 years old. She was just a baby at that time.'

Friedman, who worked with Wade Robson on the choreography of the I'm a Slave 4 U video, said that Spears 'knew how to make things look her own' when presented with a routine.

He added, 'And I think the gift of a great choreographer is when you give choreography to an artist, you choreograph it for them, and you have them in mind.

'So when they do the work, it should look like them, and it shouldn't look like they're trying to be someone else.'

Friedman, who has also collaborated with artists such as Beyoncé, Rihanna and Lady Gaga, said 'the process was easygoing' in making the music video.

'It wasn't the way I choreograph now, which is methodically and I'm in my head and I second-guess everything,' Friedman said. 'It was that blind naivete that you have when you're younger: healthy delusion where you think everything you do is going to be epic and you don't second-guess things.

'And I think that was why it was so magical.'