Kari & Katrina Kari and Katrina are sisters and best friends. They are about as close as two people can get, having shared every life experience from childhood through marriage and motherhood. Another bond the two share is their intense love for sports and a style that shows it. For their joint birthday party this year, the sisters have invited all of their friends and family to help them celebrate. Katrina and Kari want to take a timeout from their tomboyish ways and score big with a brand new style!