Post a picture that is symbolic of a song, and the next person must guess what the song is, and then post a new picture.
Be creative.
Create your own pictures if needed.
Example:
If one person posts this picture
![Image](http://i35.tinypic.com/5vaqgm.jpg)
The next person answers "Spam" and then posts their own picture.
First picture:
![Image](http://i35.tinypic.com/v6ugrq.jpg)