Noel Gallagher has slammed fellow Brit Ed Sheeran, insisting he can’t “live in a world” where the singer is headlining London’s Wembley Stadium. Sheeran has sold out three summer gigs at the fabled venue, which holds a capacity of 80,000 people, and grumpy Gallagher is far from happy.But Sheeran, who has become one of Britain’s biggest acts thanks to the success of his chart-topping album “X,” fired back at Gallagher’s comments on Twitter, simply writing, “I can live in it, it’s really enjoyable.”