I did a singing competition themed lesson for my After School English class and they loved it. We learnt simple vocab about voice and describing voices and then watched youtube videos of auditions for singing competitions like the voice, etc - and then we 'judged' the singers. The students loved it and we got some new sentences out. Great for an easy to prep class and something new and interesting.

see whole lesson here and download free PPT: http://mrsbaiasclassroom.blogspot.kr/2015/03/you-be-judge-english-club-judging.html