The country singing duo have been married since 2011 and are still going strong, reported Digital Spy.
"I'm not sunshine and roses. Blake's the happiest person on the planet. He pulls me out of my darkness... Literally everything is the best about being married," Lambert said.
The 31-year-old also spoke about the joy of her 20-pound weight loss, although she believes there is too much pressure on women.
"I'm just like anybody else, insecure and scared of looking bad or being criticised. But everybody's making this big, giant thing about it.