"I feel like I've started to grow up and be more of a woman instead of this crazy girl," she told Roberts. "I sort of feel settled, so I'm kind of ready to move to the next step in life."
Lambert is looking forward to settling down with her fiance, the country music star Blake Shelton.
They'll be a real power couple at the Country Music Awards. In addition to Lambert's nine nominations, Shelton is nominated for four CMAs himself.
The couple is planning a spring wedding.
"I'm really fortunate that I found someone that so gets me," Lambert said. "He just keeps me laughing."