Heidi Klum, 50, splashes around in a skimpy black bikini and shares a kiss with husband Tom Kaulitz, 34, while vacationing in St. Barts

Heidi Klum looked amazing in a stringy black bikini as she frolicked on a beach in St. Barts with her husband Tom Kaulitz.

The 50-year-old German supermodel — who shopped with her spouse in Los Angeles earlier this month — showed off her perky cleavage in her triangle top and coordinating bottoms that tied on the side.

The cheeky swimwear bared the beauty's pert derriere as she soaked up the sun during the holiday weekend.

Klum and Kaulitz, who is also a native of Germany, looked like they had a wonderful time as they canoodled while having fun with a Christmas-themed reindeer floatie.

The mother-of-four flaunted a sexy, glossy red manicure that was long and filed into a pointy shape.

Heidi beamed as she wore a pair of glamorous, round shades to protect her eyes from the bright sun.

Her blonde hair, which featured her signature shaggy bangs, was loose and wavy after it dried from getting soaked in the salty seawater.

The barefaced beauty looked gorgeous despite not wearing any makeup.

For his part, Tom — who is part of the band Tokio Hotel — was dressed in a silky, golden yellow, printed shirt and shorts co-ord.

When he got into the water with his wife, who he married in 2019, he wore a pair of pale green and blue patterned swim trunks.

He looked handsome with his long brown hair flowing down his back and a full, dark beard.

Missing from the scene were the former Victoria's Secret model's brood: daughter Leni, 19, and sons Henry, 18, Johan, 17, and Lou, 14.

When the couple tired of the ocean they got dressed and headed to their next activity.

Over Thanksgiving weekend, Heidi also used social media to share footage dancing with Tom in their kitchen as they cooked together and enjoyed wine.

Kaulitz spun the 5ft9in superstar around before they embraced each other while listening to Leave The Door Open by Silk Sonic.

Klum was previously married to British singer Seal from 2005 and 2014, and he's remained in her daughter Leni's life.

The exes, who were married for nine years, also share their three sons.