The Browns have a #1...Carrie Underwood has a new dog... Congratulations go out to Kane Brown and his wife, Katelyn. Their duet, "Thank God," hits number-one on the Mediabase country singles chart just in time for Valentine's Day. While this isn't Kane's first trip to the top, it is Katelyn's' debut number-one. Carrie Underwood has announced a new addition to the family- a new dog.In an Instagram post, she introduced Charlotte, a cute blonde shelter pup she met when…