US R&B singer Usher has promised to roller-skate during his Super Bowl half-time show, in Las Vegas, on Sunday

He said would recreate a skating sequence that had become a viral highlight of his recent Vegas residency, while the show would be a “crescendo” marking a “new beginning” in his 30-year career. Previous Super Bowl half-time show performers include Katy Perry, Prince and Beyoncé. But Usher will be the first independent artist to take […]