Luke Bryan‘s family is growing again: His niece Jordan Eudy and her husband ... rocking an adorable “Big Brother” sweatshirt. Two blue balloons complete the announcement, one for each ...

asked Bryan ... into his arm. "Katy is making me take my first-ever IV with vitamins," said Bryan, narrating the pop superstar's video. "Why do we have to go this route, Luke?" ...

Luke Bryan's Crash My Playa ... shocked and puzzled as to why he'd given up his mic. Aldean took back over, playfully grabbing Bryan in a big brother-type headlock to bring him back over to ...