New Zealand-born singer says her 2011 album has 'gone through a bit of an evolution' for its May 22 release in the U.S.

Kimbra has already topped the charts as Gotye's former love on his smash hit "Somebody That I Used To Know." This week, the New Zealand-born songstress will finally release her genre-defying Vows in the U.S.

The album, which incorporates dance, pop and alternative, will be released on May 22. And despite the fact that Kimbra's "lived for these songs for nearly five years," she found a way to renew her Vows by featuring five new songs on the Stateside release.

"It kind of feels like it's gone through a bit of an evolution," she told MTV News. "For that reason, I feel refreshed going out to promote it. It still feels new."

In order to freshen up the album, she enlisted the help of some legendary producers, including Greg Kurstin (who's worked with the Flaming Lips and the Shins) and Mike Elizondo (who worked with Dr. Dre). "I just think you learn a process that works for you," she said. "I think I took a lot from the first few years of making Vows and then when I came here to work in America, I knew the ways I like to work."

Kimbra said she's enjoyed exploring different genres on the new tracks, including girl-power anthem "Warrior" with A-Track and Mark Foster as well as the funky "Come Into My Head."

"It channels a bit of a funk thing, which is something I'm dabbling in more now with the live band," she said of "Come Into My Head." "It's got a lot of syncopation and quite a heavy groove, so, I think, maybe that's a new direction for me to start exploring on the second album, perhaps."