Pop star Taylor Swift continues her Eras World tour across Europe, having kicked off her European leg on May 9 in Paris. Recently, she performed two sold-out shows at the revamped Santiago Bernabeu Stadium, home of the Champions League winners, Real Madrid.

During one of her shows in Madrid, a mysterious figure was recorded at the highest point of the stadium. This figure, shining peculiarly against the backlight and appearing to be playing a guitar, seemed to be enjoying and dancing with Swift’s music and the spectacular show that leaves thousands of fans mesmerized every night.

Social media exploded with theories about the figure’s identity. Some speculated it could be a nod to Swift’s song “Dancing Phantoms on the Terrace,” while others jokingly suggested it might be her boyfriend, NFL star Travis Kelce, incognito. A more far-fetched theory was that it was a security guard with a sniper, due to the figure’s posture. Regardless of the speculation, it’s clear that reaching such a spot in the stadium is not impossible, thanks to the “sky walk” feature of what is arguably one of the best stadiums in the world.

Taylor Swift’s European tour continues today with a concert in Scotland, marking the beginning of her month-long stint in the UK. In July, she will perform in the Netherlands before returning to the United States in October, meaning she will miss the early season games of her boyfriend Travis Kelce’s team, the Kansas City Chiefs. Swift will wrap up her European tour at the iconic Wembley Stadium.

As always, Swift’s performances are not just about the music but also about creating memorable experiences for her fans, with this latest mystery only adding to the excitement and anticipation surrounding her tour.