Britney Spears on Apple Music Festival Performance: 'The Energy Was Incredible'!

Britney Spears rocks thigh highs and a mini dress while heading to do promo work at BBC Radio 1 on Wednesday (September 28) in London, England.

The night before, the 34-year-old entertainer returned to London to perform for the first time in years! Britney headlined the Apple Music Festival, and you can watch her entire performance at iTunes.

“The energy tonight was INCREDIBLE!!! @AppleMusic thank you so much for having me �’� #AMF10 #AMFBritney,” Britney tweeted after the show.

10+ pictures inside of Britney Spears doing promo work in London…