MUSIC IN THE PARK: Billy Gilman sings one of his hit songs “Oklahoma” during the first Chehalis Music in the Park at Recreation Park concert in Chehalis on Friday, July 18. Gilman has been a country music star since he was 11 years old when he topped the country charts in 2000 with his smash hit “One Voice.” He remains in the Guinness Book of World Records as the youngest artist to ever top the country charts. After a break and finishing school, the Rhode Island native made his way to the “The V