A simple activity which at first sight looks like a grammar-type exercise. However, the students must complete one of the 25 unfinished phrases of passages of songs with wherever he wants. The example given, for instance, can have many different endings, according to each person's situation.
Most importantly, I would advise you to start this activity in silence, with each student writing down his or her own completion. This guarantees that people will not be stuck for words, which usually happens if you present somebody with a half-finished sentence and ask for an immediate verbal reaction. I have found that, if you give students time to think, they will produce better sentences. This will definitely trigger interest on the part of the other students, and reduce tension. Moreover, it is the student who gets to create something. The teacher merely oversees, and hence does not dominate the class.