KEITH'S BULKING UP with Hugh!

Keith Urban turned his performance at the Country Music Association Festival in Nashville into a bulging-bicep bonanza!

Keith’s muscles did not go unnoticed by fans, and close sources tell New Idea there’s a reason the singer is looking beefier these days – Hugh Jackman!

Hugh, whose famous role as Wolverine has seen him undertake extreme diets and workouts, is said to be working with Keith, 55, on overhauling his health and keeping him motivated.