Later that year, she released a single, "The One", which peaked at number nine on the Canadian charts. In 2004, she played Tracy Turnblad, the lead role in the Canadian version of Hairspray, for which she was nominated for a Dora Award.
In 2003, Olivarez was contacted by Canadian songwriter and actor James Collins who brought her to Toronto, Canada, to write and record some new music. Her first single, "The One", co-written by Olivarez, James Collins and Dave Pickell, had "I'm In Love with My Best Friend's Ex" as a B-side, and reached number nine on Canada's single charts & Top Thirty on the Canadian BDS airplay chart. Another of her songs, "As Vain As You" (also co-written with Collins & Pickell), was on the compilation album Girls Night Out 3.
She played Tracy Turnblad in the Canadian version of the musical Hairspray. After Hairspray she returned to the United States and joined an Atlanta musical group Butterfly Stitch which released an EP and live album.
In May 2005 she appeared in an American Idol theme week on Family Feud.
In 2009 she co-founded Granville Automatic, a country duo, with guitarist and songwriter Elizabeth Elkins who is a grand prize winner of the John Lennon Songwriting Contest. According to their biography at Last.fm they are named for a 19th-Century typewriter and collaborate to write and perform songs about history. They recorded an eight-song set for an episode of PBS’ Sun Studio Sessions (taped at Memphis' Sun Studio) and the digital-only EP Live from Sun Studio is available online. Their self-titled album, Granville Automatic, came out in 2012. Their second album, An Army Without Music, was released in 2015 and is a collection of songs inspired by Civil War battles.