Country singer Zac Brown is excited for his upcoming residency at Sphere in Las Vegas - but his bank account isn't too happy about it. "Just going into debt to make it happen," Brown, 46, told Us Weekly exclusively while promoting the upcoming shows, which kick off in December. "It's a big moment in time and it's like, for us, I want to be among the names of the Grateful Dead and the Rolling Stones and the bands that take that lifelong career impact fan journey to be able to do that. This is our statement to try to step into that.