Country music star Brantley Gilbert had to interrupt his own concert on Friday night to help his pregnant wife give birth to their baby on his tour bus. Brantley Gilbert had a gig he’d remember for the rest of his life, when he had to stop playing when his wife went into labor over the weekend. Thankfully, a midwife was reportedly on the bus to assist with the birth, after his wife Amber went into labor just as he was starting his set at the Candence Bank Arena in Tupelo. It’s the same birthplace of the famous Elvis Presley in Mississippi. ‘We got a baby!’Detailing the ‘craziest night’ of his …