Their relationship is going from strength-to-strength, and Taylor Swift and Calvin Harris apparently just can't get enough of each other.

The two musicians were spotted leaving Taylor's New York City apartment separately on Wednesday, after Calvin had stayed over following their romantic date night the previous evening.

The 25-year-old looked extremely cheerful as she stepped outside in a skimpy white romper, leaving her very long and slender legs on show.

Taylor gave her statuesque 5ft 10in frame a boost with turquoise suede heels, and had a tan handbag slung over one arm.

The Blank Space hit-maker styled her sandy blonde hair in pretty curls, and wore black winged eyeliner and a slick of pink lipstick.

Taylor, who had plenty to be happy about after her new single Bad Blood reached number one on the Billboard Hot 100 on Wednesday, greeted fans gathered outside her apartment building.

Calvin had left the building first to make his way to a workout, dressed in a black T-shirt, shorts and baseball cap, with bright blue trainers.

Things appear to be pretty serious between the couple, and the 31-year-old is clearly keeping some of his clothes at Taylor's apartment for days such as these.

The pair were seen arriving back from a dinner date late the night before.

They had earlier been photographed leaving hand-in-hand to go for a meal at L'asso restaurant in Little Italy, with Taylor looking gorgeous in a pale blue and white printed crop top and mini-skirt.

Meanwhile her DJ boyfriend was keeping it casual in his signature dark jeans and a leather jacket.

Taylor and Calvin were first linked after the BRIT Awards in February, and they slowly went public with their relationship in the following few weeks.

The pop star is still making time for romance despite a hectic schedule.

Taylor is currently on the US leg of her 1989 World Tour, and launched the star-studded music video for Bad Blood at the Billboard Music Awards earlier this month.

Meanwhile, she was named the youngest woman ever to be included on the Forbes list of The World's 100 Most Powerful Women on Tuesday. 

According to Forbes, who placed her at number 64, Taylor 'has not only broken record sales and captivated the world with her fantastically honest lyrics, but she has proven herself as an impressive businesswoman.' 

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