Taylor, 25, jumped on the back of her boyfriend's muscular body, wrapping her arms around his neck and smiling from ear to ear.
The 1989 hitmaker wore a plaid print bikini including high-waisted bottoms for a retro look.
Meanwhile, a shirtless Harris, 31, held onto to his beloved's $40 million legs wearing a soaked pair of grey swim trunks with his brawny body still wet from the water.
In another photo, Taylor captured a playful mid-air moment with her A-list squad, who got in the patriotic spirit with red, white and navy striped towels.
On the far left, Gigi shows off her model figure in a blue bikini, Empire star Serayah sports a black two-piece jumping next to Taylor while Victoria's Secret beauty Martha keeps two feet on the ground.
'Happy 4th from me, @GiGiHadid @iammarthahunt @britmaack @SerayahLove and @HAIMtheband,' she wrote.
Taylor Swift shows off bikini body as she and boyfriend Calvin Harris get hands on at Fourth of July party!
Her romance with Scottish beau Calvin Harris is certainly heating up, and not just because it's summertime.
On Friday, Taylor Swift shared a lovey-dovey photo of herself getting a piggyback ride from her EDM boyfriend along with the caption: 'Friendly relations between Scotland and America.'
Dressed in only their bathing suits, the PDA-packed pair celebrated the Fourth of July with celebrity pals Gigi Hadid, Joe Jonas, Serayah, the Haim sisters, Nick Jonas, and Martha Hunt for a backyard pool party.
Taylor, 25, jumped on the back of her boyfriend's muscular body, wrapping her arms around his neck and smiling from ear to ear.
The 1989 hitmaker wore a plaid print bikini including high-waisted bottoms for a retro look.
Meanwhile, a shirtless Harris, 31, held onto to his beloved's $40 million legs wearing a soaked pair of grey swim trunks with his brawny body still wet from the water.
In another photo, Taylor captured a playful mid-air moment with her A-list squad, who got in the patriotic spirit with red, white and navy striped towels.
On the far left, Gigi shows off her model figure in a blue bikini, Empire star Serayah sports a black two-piece jumping next to Taylor while Victoria's Secret beauty Martha keeps two feet on the ground.
'Happy 4th from me, @GiGiHadid @iammarthahunt @britmaack @SerayahLove and @HAIMtheband,' she wrote.
Taylor, 25, jumped on the back of her boyfriend's muscular body, wrapping her arms around his neck and smiling from ear to ear.
The 1989 hitmaker wore a plaid print bikini including high-waisted bottoms for a retro look.
Meanwhile, a shirtless Harris, 31, held onto to his beloved's $40 million legs wearing a soaked pair of grey swim trunks with his brawny body still wet from the water.
In another photo, Taylor captured a playful mid-air moment with her A-list squad, who got in the patriotic spirit with red, white and navy striped towels.
On the far left, Gigi shows off her model figure in a blue bikini, Empire star Serayah sports a black two-piece jumping next to Taylor while Victoria's Secret beauty Martha keeps two feet on the ground.
'Happy 4th from me, @GiGiHadid @iammarthahunt @britmaack @SerayahLove and @HAIMtheband,' she wrote.