Britney Spears brags about gaining weight in post written in Spanish as she dances around her home while slapping her backside: 'At least I have a butt now and can move it all day!'

Britney Spears bragged about something unusual in the world of entertainment — gaining weight.

The singer, 41, who recently consented to allow her sons to move to Hawaii with their dad Kevin Federline, donned a blue animal print string bikini bottom and a white strapless crop top for another online dance recital.

‘I gained weight,’ she posted in Spanish next to the video, ‘but at least I have a butt now and can move it all day!’ It’s not clear why she opted to write the text in Spanish, as she usually writes in her native English.

The hitmaker, who looked as fit as ever, wore white slouchy boots as she twisted and twirled across the tile floors of her spacious home to Janet Jackson’s All Nite (Don’t Stop), sometimes spanking her bottom.

Her long blonde hair was styled in loose layers with bangs, and her makeup looked natural.

Weight gain: Britney Spears bragged about something unusual in the world of entertainment — gaining weight. ‘I gained weight,’ she posted in Spanish next to a video of her dancing, ‘but at least I have a butt now and can move it all day!’

One of her dogs was curious about the commotion and joined the scene as a furry dance partner.

Some of Britney’s fans have accused her ex-husband Kevin Federline of moving to Hawaii to force Britney to continue her generous child support payments for their sons Sean, 17, and Preston, 16.

Hawaii requires parents to pay child support up to the age of 23 if a child in a full-time educational program at a college, university or vocational program.

Britney began paying $20,000 a month when Kevin got full custody.

That amount was raised to an undisclosed amount in 2018, after she was asked for more.

The Toxic singer claimed she was paying $40,000 a month in a now deleted audio clip to Jayden after an interview he did with ITV, saying ‘I just want her to get better mentally. When she gets better, I really want to see her again.’

The former dancer’s attorney told People the move is ‘an opportunity for Kevin and his wife, and the boys are ready to get away from the L.A. microscope.’

Kevin’s wife, Victoria Prince, graduated from the University of Hawaii with a degree in Speech.

She has been reportedly offered a job at a university in the Rainbow state.

Twirl: The hitmaker, who looked as fit as ever, wore white slouchy boots as she twisted and twirled across the tile floors of her spacious home to Janet Jackson’s All Nite (Don’t Stop)

Red:  Britney’s bum was red from being slapped as she danced around her home wearing a blue animal print bikini bottom and a white strapless crop top

Furry dance partner: One of her dogs was curious about the commotion and joined the scene as a furry dance partner

Separated by an ocean: Britney has given her consent allowing ex-husband Kevin Federline to move their sons Sean Preston and Jayden (pictured) to Hawaii

Rise to fame: Federline, who currently has sole custody of the boys and received child support from Spears, was married to the  pop star from 2004–2007 (pictured together)

Kevin has also claimed he will have some professional opportunities there.

In addition to taking care of Sean and Jayden, the couple are parents to Jordan Kay, almost 12, and Peyton Marie, nine.

Britney’s fans have pointed out the move may have been sparked after Kevin and Victoria were sued by their daughters’ school for being more than $15,000 behind on their tuition payments.

Kevin shares sons Kori, 20, and Kaleb, 18, with ex-fiancée Shar Jackson.