Rumour has it that Spears is one of Sir Elton John’s four guest collaborators, who will perform with the singer during his debut headlining performance this weekend.
One of Britain’s best-loved music festivals, Glastonbury opened its doors to attendees earlier this week, as musical performances began on Friday 25 June.
Speaking about John’s set, his husband David Furnish recently revealed the “Rocket Man” singer would bring on “four collaborators of his choosing”.
Rumoured to be one of these guest acts, Spears recorded a new version of John’s hit “Tiny Dancer” last year – her first song since a judge ruled to end the contentious conservatorship that controlled much of her personal and professional life.
If her recent Instagram posts are anything to go by, it seems the 41-year-old singer is getting ready to perform the “perfect tranquil late summer bop” for the first time at Glastonbury.
On Thursday 22 June, the Grammy-winner posted a picture of an apple that appears to be cut in the shape of St George’s Flag, and left three emojis of the Union Jack.
The next day, she shared artwork of what looks like a fish sandwich and chips alongside the same caption.
The artist Noah Verrier has previously confirmed the oil painting depicts a McDonald’s Filet-O-Fish with a strawberry shake and fries. The meal is placed next to a vase of roses, a flower commonly associated with Britain.
Fans will remember Spears’s now-deleted post in which she revealed she was heading to London this week. The “Womanizer” singer reportedly claimed it was for a shopping trip at the time.
The Independent has contacted Spears’s representatives for comment.
As excitement over John’s set builds, some people are also theorising that Sir Paul McCartney will join him for his final UK show ever.
McCartney was spotted at Glastonbury on Friday, enjoying the Foo Fighters’s set that may go down as the festival’s worst-kept secret.
Other musicians that might be John’s collaborators include Dua Lipa, whom John brought on during his final US show last November, Lil Nas X, and Rina Sawayama.
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