Brenda Lee was the top charting female-solo vocalist in the 60's. Considered to be an overrated feat, Lee's impressive vocals and diversification solidifies her place as a terrific artist She sang rockabilly, pop and country music. Her 47 chart hits rank amongst The Beatles, Elvis Presley, and Ray Charles. Her 1966 hit "I'm Sorry" peaked at No. 1 on the Billboard Hot 100. Arguably Lee's most popular track, "Rockin' Around the Christmas Tree", is a United States holiday hit for more than 50 years.