key -n. a lever with a flat surface that is pressed with a finger to activate a mechanism of a machine or instrument

composer -n. a person who writes music

tribute -n. something that you say, give, or do to show respect or affection for someone

lyrics -n. the words of a song

crush -n. a strong feeling of romantic love for someone that is usually not expressed and does not last a long time

improvise -v. to speak or perform without preparation