Doing some karaoke is a popular activity that involves singing along to pre-recorded music. It usually involves singing popular songs with friends or family, and can be done in a variety of settings, such as at a bar, at home, or even online. The two crossword solutions for the term 'do some karaoke' are 'SING' (4 letters) and 'singasong' (9 letters). Singing is the main activity involved in karaoke, and 'singasong' is a phrase that captures the essence of the activity.