Heidi Klum shows off her bikini body in a playful video as she reunites with ex-husband Seal on America's Got Talent

She works hard to keep her statuesque supermodel figure in shape.

And Heidi Klum showcased the fruits of her labor as she larked around in a playful video posted to her Instagram page on Tuesday.

The German catwalk queen, 44, displayed her toned physique in a tiny string bikini as she jumped for joy in the ocean with a male friend while soaking up the Caribbean sun in St. Barts. 

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Bikini babe: And Heidi Klum showcased the fruits of her labor in the gym as she larked around in a playful video posted to her Instagram page on Tuesday

Bikini babe: And Heidi Klum showcased the fruits of her labor in the gym as she larked around in a playful video posted to her Instagram page on Tuesday

Filming a short promo for the upcoming season of Germany's Next Top Model, the television personality spoke in her native language as she bobbed and weaved in the ocean's current.

Wearing a black and white print bikini, the model seemed to be enjoying her time in the open water.

The blonde bombshell looked to be make-up free and wore her blonde locks slicked back from her face. 

Heidi is vacationing in St. Barts with her art curator beau Vito Schnabel, 31, and her four children; Leni, 13, Henry, 11, Johan, 10, and Lou, seven. 

Fun in the sun: The German catwalk queen, 44, displayed her toned physique in a tiny string bikini as she jumped for joy in the ocean with a male friend while soaking up the Caribbean sun

Fun in the sun: The German catwalk queen, 44, displayed her toned physique in a tiny string bikini as she jumped for joy in the ocean with a male friend while soaking up the Caribbean sun

Paradise: Filming a short promo for the upcoming season of Germany's Next Top Model, the television personality spoke in her native language as she bobbed in the ocean's current

Paradise: Filming a short promo for the upcoming season of Germany's Next Top Model, the television personality spoke in her native language as she bobbed in the ocean's current

Heidi also announced on her social media accounts that she will reunite with ex-husband Seal on Tuesday night's episode of America's Got Talent with the British musician appearing on the show as a guest judge.

In an interview with PEOPLE, Seal said: 'I was thrilled to be part of what has become America's favourite TV show. 

'I've been an admirer of Simon's ever since we both lived in England, and to work beside him was both a privilege and an education.' 

Vacation time: Wearing a black and white print bikini, the model seemed to be enjoying her time in the open water 

Vacation time: Wearing a black and white print bikini, the model seemed to be enjoying her time in the open water 

Magic makers: Heidi also announced on her social media accounts that she will reunite with ex-husband Seal on Tuesday night's episode of America's Got Talent

Magic makers: Heidi also announced on her social media accounts that she will reunite with ex-husband Seal on Tuesday night's episode of America's Got Talent

Gym buff: Seal showed off his workout routine in an Instagram snap captioned, 'Another week, another great opportunity to overcome'

Gym buff: Seal showed off his workout routine in an Instagram snap captioned, 'Another week, another great opportunity to overcome'

Posting a fun snap on her Instagram page, Heidi wrote: 'Love goofing around with Seal on AGT #JudgeCuts!' 

The couple split amicably in 2012 after seven years of marriage and share four children together.

Leni's biological father is the Italian managing director of Renault's Formula One team, Flavio Briatore, 67.

Seal chose to adopt little Leni when she was five years old.  

Judging: Heidi appears as a judge on America's Got Talent alongside show boss Simon Cowell

Judging: Heidi appears as a judge on America's Got Talent alongside show boss Simon Cowell

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