What "Some Hearts" singer collaborated with Keith Urban on Ripcord?
Ripcord (album): Ripcord is the ninth studio album by New Zealand-born Australian country music singer Keith Urban. Ripcord (album):  For this album, Urban collaborated with musicians such as Carrie Underwood, Pitbull, and Nile Rodgers. Carrie Underwood:  Her debut album, "Some Hearts", was released in 2005.
Carrie Underwood