Going solo! Taylor Swift releases filmed acoustic rehearsal of I Don't Wanna Live Forever... without Zayn

Taylor Swift released a YouTube video Thursday in which she rehearsed her latest song I Don't Wanna Live Forever (Fifty Shades Darker).

She'd given the number the pared-down treatment, strumming an acoustic guitar as she sang and managing without any other accompaniment.

In fact, she'd stripped away so many trappings that she did without even Zayn, her duet partner on the recorded version released December 9.

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Makes perfect: Taylor Swift released a YouTube video Thursday in which she rehearsed her latest song I Don't Wanna Live Forever (Fifty Shades Darker)

Her video saw her in a simply stylish outfit featuring a tight black turtleneck, which emphasised her enviably svelte torso.

The camera looked at her from below as she stood at a mic in the studio. Various people were milling about some distance behind her, surrounded by equipment.

The rehearsal was in aid of DirecTV Now Super Saturday Night, a concert she's doing the night before the Super Bowl in the same city: Houston, Texas.

Spartan: She'd given the number the pared-down treatment, strumming an acoustic guitar as she sang and proceeding without any other accompaniment

Solo act: In fact, she'd stripped away so many trappings that she did without even Zayn, her duet partner on the recorded version released December 9

She cooed her way through the first verse - which on the record belonged to the erstwhile One Direction member - and then slid into the chorus.

When she got to the series of musicalised 'Oh's peppered throughout the song, she leaned down to sing one of them straight into the camera.

Swift co-wrote the song with Lena Dunham's boyfriend Jack Antonoff and LoveHate Thing writer Sam Dew for the soundtrack to Fifty Shades Darker.

The point: The rehearsal was for DirecTV Now Super Saturday Night, a concert she's doing the night before the Super Bowl in the same city: Houston, Texas

In the music video, which debuted online last Friday, the 27-year-old and her 24-year-old duet partner trash a room at the swank St Pancras Renaissance London hotel.

On Wednesday, Swift put up the latest of multiple behind the scenes clips outlining the process of filming the passionate music video.

Sat in a white dressing gown and full make-up, she gave viewers the setting: 'We're in London. It is - it's earlier than I care to really even say.'

She explained: 'We're starting to shoot the video for I Don't Wanna Live Forever, and I'm first, because clearly I don't demand late enough call times. 'Cause Zayn's asleep, somewhere in London, I imagine, under some kind of silk duvet.'

Inside look: Swift's been uploading behind-the-scenes videos of the music video of the song, which features herself and the erstwhile One Direction singer trashing a room at the swank St Pancras Renaissance London hotel

'It's earlier than I care to really even say': A behind the scenes video posted Wednesday saw the 27-year-old sat in a white dressing and full makeup for her morning call-time

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