The term 'POP STAR' can be broken down into four crossword solutions: IDOL (4 letters), NOVA (4 letters), CELEB (5 letters), and DINAHWASHINGTON (15 letters). An IDOL is a person who is admired and respected, often a celebrity. A NOVA is a star that suddenly increases in brightness, usually due to an explosion. A CELEB is a famous person, usually a performer or athlete. Dinah Washington was an American singer and pianist who was popular in the 1940s and 1950s. She was known for her blues, jazz, and gospel music.