Britney Spears has always been a fashion icon. On June 4, Spears, 41, posted a video of herself wearing a silky, lacy mini dress and high heels at the gym. "I’ve never been to the gym in high heels.

Watch this hilarious video of these gym staff members trying the resistance band challenge. Kamal Mamedov, from Suffolk, UK, was at his gym when his staff members when he decided to capture the ...