Kreviazuk is a classically trained pianist. Her first album Under These Rocks and Stones was released in 1996 to critical praise. In 1998, Kreviazuk scored her first international hit with a cover of John Denver's "Leaving on a Jet Plane" from the soundtrack to the blockbuster film Armageddon. "In This Life," a searing romantic track from 2002's What If It All Means Something, was her next major hit. She performed the song live on The Tonight Show with Jay Leno, and it can be heard in the film "Saved", in which Jena Malone's teenage character is informed by a free clinic that she is pregnant. The NBC drama "Providence" features her voice singing a cover of the Beatles' "In My Life", and the show's soundtrack includes several other Beatles tracks. Kreviazuk's "Time" was played in the credits of the movie, Uptown Girls, and featured in an episode of the MTV reality show, Laguna Beach: The Real Orange County. In 2005, two new songs written and performed by Kreviazuk were also featured on the soundtrack of the movie The Sisterhood Of The Traveling Pants. And in 2006, "It's All About a Kiss" played during Lindsay Lohan's "Just My Luck."
Kreviazuk announced via her blog in August 2005 that she was writing and recording her fourth album in her home studio, with Maida producing. The album is expected for release in mid-2006. She also writes a Myspace page, where she posts her thoughts on world politics, as well as updating fans with the latest on how writing/recording for her album is going.
In December 1999, she married the lead singer of Our Lady Peace, Raine Maida. On January 16, 2004, their son, Rowan, was born. Their second child, a boy named Lucca Jon, was born on June 3, 2005.
In 2003, Kreviazuk and Maida collaborated on a number of tracks with Avril Lavigne for Lavigne's second album Under My Skin, during which time Lavigne moved into their Malibu home. Kreviazuk and Maida also contributed songs to Kelly Clarkson's 2004 album Breakaway, The Veronicas' The Secret Life Of The Veronicas and Marion Raven's Here I Am. Kreviazuk and Maida have also been enlisted as producers on third season American Idol runner-up Diana DeGarmo's first album. Other notable writing credits to Kreviazuk's name include being one of six people to pen Gwen Stefani's "Rich Girl".