One More Girl is a Canadian country music duo composed of actor-singers Carly McKillip and Britt McKillip, who are sisters. They signed to EMI Canada in 2008 and released their debut single "I Can Love Anyone" that year.

It debuted at #42 on the Radio & Records country singles charts in Canada in December 2008.Their debut album, Big Sky, was released in Canada on October 6, 2009. They have released four singles from the album: "I Can Love Anyone", "Misery Loves Company", "When It Ain't Raining" and "Tumblin' Tears".

"I Can Love Anyone" was their debut song and peaked at number #18. "Misery Loves Company" was the girls' second single and it reached number #30 on the charts. "When It Ain't Raining" has been One More Girl's biggest hit as of yet, managing to chart not only on the Canadian Country Chart as number #7, but also on the Canadian Hot 100, peaking at #86.

The girl's fourth single "Tumblin' Tears" also broke into the top 10 on the charts.