If they were worried about fuelling relationship rumours Taylor Swift and Ed Sheeran certainly showed no sign of it as they performed a flirty duet on the season finale of Britain’s Got Talent.

The Nashville girl was positively beaming as she sang with the ginger haired Suffolk boy about a childhood romance in their co-written song Everything Has Changed, on Saturday’s televised episode.

The duo’s effortless rendition of the nostalgic song comes after Ed was recently spotted leaving Taylor’s hotel room at four in the morning, although he insists they’re just friends.

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Flirty rendition: Taylor Swift and Ed Sheeran performed their duet Everything Has Changed on the finale of Britain’s Got Talent, on Saturday

The 23-year-old songstress assumed Ed’s signature throaty vocal style for the acoustic set as she kicked off the performance with a series of drаmаtic hand gestures.

Taylor set her smouldering blues eyes directly into the sight line of the rolling television cameras as she wore her straw coloured hair in a ponytail.

The Love Story singer was pretty in a polka dot summer dress as she clutched her steel stringed guitar while belting out the lyrically complex ballad.

Kicker: Taylor began the performance with a series of drаmаtic hand gestures

Sweet moment: Ed closed his eyes as he crooned while his glamorous partner sauntered over to him with obvious delight

Ed, for his part, appeared more reserved as he strummed his way through the song.

Once it was his turn to take over the lead vocals Taylor hopped over to his microphone, rocking back and forth as he crooned.

With his trademark shaggy ‘do covering his pale blue eyes, the 22-year-old wore a blue long sleeve shirt and baggy jeans as his glamorous partner stood tall in heeled dancing shoes.

Stunning performance: The Love Story singer was gorgeous in a polka dot summer dress

Once the rendition was completed Taylor said: ‘That song was from my album.’

To which presenters Ant and Dec replied, ‘What did you think of the final?’ referring to the completion of the BGT season.

Taylor said, ‘It was amazing. We have our favourites – I’m obsessed with Attraction and Pre-Skool,’ as Ed added, ‘I really like Jordan.’

Taylor would have been pleased as puncҺ when shadow theatre group Attraction won the competition.

Swan song: Taylor set her smouldering blues eyes directly into the sight line of the rolling television cameras as she wore her straw coloured hair in a ponytail

In the official music video for Everything Has Changed the duo enlisted a couple of cute mini-me lookalike children to play out their lyrical storyline.

The children enact the words of the song, about a boy and girl blossoming into something romantic before everything starts changing.

Throughout the stars throw in hints of themselves, from the girlie dresses worn by the young Taylor Swift lookalike, to Ed’s mini-me playing guitar to the girl in a music lesson as the rest of the children run riоt.

In a twist at the end, both Taylor and Ed turn up to the school separately to pick up the children and act as each child’s parent.

Rumоured romance: Ed recently insisted that he and Taylor are only friends