Adele has canceled the final two shows of her tour, she announced in an emotional Facebook post on Friday, revealing that she’s damaged her vocal cords.

“On medical advice I simply am unable to perform over the weekend,” she wrote. “To say I’m heart broken would be a complete understatement.”

The news follows two consecutive nights performed at Wembley Stadium (June 28 and 29), during which Adele was poised to attendance records at the London venue. According to British industry trade Music Week, 100,000 fans per night were expected. The previous year, Adele played eight shows at the city’s O2 arena.

The singer had inserted copies of a handwritten note into the tour program for the first two nights of her Wembley bow. One of the notes implied that Adele may never tour again.

The Wembley dates mark the end of a world tour that has hit multiple continents, including North America (where a 2016 show in Phoenix was postponed, due to illness), Europe, Australia and New Zealand.

In the letter posted on Adele’s official social media channels, the singer writes that she was “so desperate” to finish out the run that she’d “even considered miming,” aka lip-synching.

In total, Adele has performed 121 shows on this run. If the July 1 and 2 Wembley dates are not rescheduled, refunds will be offered, the singer stated.