"My life has changed dramatically in the last year. I think that style definitely reflects your mood," she says in a new interview with Haute Living, shared exclusively with PEOPLE. "Maybe it's a little more feminine right now."
The former Voice coach – who has a new collection of sunglasses and eyeglasses through her L.A.M.B. and gx by Gwen Stefani lines – had her life turned upside down when she went through a difficult divorce from ex-husband Gavin Rossdale, but found support in Shelton.
"Definitely my life has gone somewhere else – that's for sure – so maybe my style is reflecting that, which is great. It's always fun to evolve, so I feel good about that."
The "Made Me Like You" singer demurred when it came to naming specifics about what made her fall for Shelton, but admitted he was a strong shoulder to lean on during difficult times.
"When you're going through a really tough time, there are people that come in your life, like a friend that can help you get through things, and he's definitely one of those people," she explained. "That's it. I feel like, when it comes to my life, I can say so much already in my songs."