Jessie J was one of the boys at the “T4 Stars of 2011” concert at London’s Earls Court over the weekend. Rocking a captain’s hat and an ’80s T-shirt, the cheeky pop star performed her single “Do It Like a Dude,” stomping her way into the arena from backstage. Jessie will return to the U.S. to tape “VH1 Divas Celebrates Soul” with Mary J. Blige, Jennifer Hudson, and more later this week.