The crossword solution for the term 'Pop Artist, J. ___' is LO, two letters. The answer is referring to the American singer-songwriter, Joanne 'Jojo' Levesque, who is better known by her stage name, JoJo. JoJo began her career in music at a young age and has since released several albums, singles, and EPs. She is best known for her pop music, which has earned her numerous awards and nominations.