Karelsson was born in the United States to Icelanders Ögmundur Karvelsson and Sigurlína Björgvinsdóttir.
[2] Karvelsson played college soccer for the University of North Carolina at Chapel Hill from 1995 to 1998, and gained a reputation as a super sub.
In the 2001 season, she played for the Philadelphia Charge of the Women's United Soccer Association,[3] after a stint at Breiðablik in Iceland.
[10] She and her husband Lance Campbell, a pharmaceutical executive who played soccer at Texas Lutheran University,[11] have four children, a son and three daughters.
This biographical article related to women's association football in Iceland is a stub.