They've been nearly inseparable since first spotted getting close in late July.

But Camila Cabello and Shawn Mendes were on separate coasts Monday.

While the Havana singer, 22, worked on a music video in LA, he other half, 21, stayed in New York.

Fit and fab: Camila Cabello was seen in Los Angeles Tuesday evening while hard at work filming her new music video

During a nighttime portion of the shoot, Camila could be spotted running barefoot through the streets whilst modeling a flowing gown.

Her white dress featured a glamorous train at the back but was cut above the knee at the front, allowing her to show off her toned legs.

The superstar's elaborate ensemble featured several frills, adding to its fashionable effect as she filmed her video.

At one point, she could be seen gathering her skirts up into her arms as the camera operators approached her in the street.

On the move: During a nighttime portion of the shoot, Camila could be spotted running barefoot through the streets whilst modeling a flowing gown

Singing sensation: Her white dress featured a glamorous train at the back but was cut above the knee at the front, allowing her to show off her toned legs

Ornate: The superstar's elaborate ensemble featured several frills, adding to its fashionable effect as she filmed her video

Workaday: At one point, she could be seen gathering her skirts up into her arms as the camera operators approached her in the street

She was also seen walking around set wearing a robe and a pair of fuzzy slippers. She looked flushed and glowy, appearing straight from performing a dance sequence.

While the cameras rolled the former Fifth Harmonizer wore a dazzling gown with tons of ruffles and a high-low skirt.

Elsewhere on set was a hunky shirt-free Shawn look-a-like, proving Camila certainly has a type.

Natural star power: Camila exuded her innate glamour as she shot her video

Making it happen: She could be seen chatting with one of her professional collaborators on the project between takes

What a team: Several members of crew could be spotted working away on the shoot

Meanwhile Shawn was enjoying a free day in the Big Apple. He kept comfortable as he strolled around the city with a friend.

The In My Blood singer was clad in an army green t-shirt, black trousers, and white sneakers.

After a bit of walking they were seen heading to the subway station.

Throwback style: Camila's off-the-shoulder outfit evoked the Golden Age Of Hollywood

Taking the right measures: The team were able to obtain a road closure in order to enable their shoot to take place

So cinematic: Motorcycle headlights illuminated the pop star as she chatted with one of the gentlemen behind the scenes

While Monday was all about relaxing, Shawn was hard at work on stage in Newark, New Jersey Sunday night.

Over the weekend he celebrated his 21st birthday with Camila in NYC.

Cabello took to Instagram on Friday to make a public birthday wish for Mendes, writing: 'Happy birthday to this magic human, I love you!!!!'

Fans began speculating about their relationship after the two shot a sultry music video for Señorita at the end of June.

Getting a good workout in: Camila ran vigorously along the lane divider

And after they were seen kissing in San Francisco in July, the rumor radar went ten-times abuzz.

Shots of the two puckering up to each other while on vacation in Miami later that month only took things further.

Speaking to Variety, Cabello opened up about working with Mendes on Señorita, stating: 'I’ve known Shawn for such a long time and it’s so much fun getting to work and do things with somebody who means a lot to you.'

Making moves: She looked flushed and glowy, appearing straight from performing a dance sequence

Dramatic: While the cameras rolled the former Fifth Harmonizer wore a dazzling gown with tons of ruffles and a high-low skirt

Opposite coasts: Camila was in LA while boyfriend Shanwn Mendes was in NYC on Monday

Stage presence: While Monday was all about relaxing, Shawn was hard at work on stage in Newark, New Jersey Sunday night