Thanks macstop.
Each user has to copy and paste adding only one song to the album so in the end it's 12 songs, one per user, and each album has to have a different theme. Only one song per user per theme per day.
Whoever adds the last song of the album gets to say what the the theme for the next album will be and it starts all over again.
Guys, please try to stick to the rules, otherwise it gets a bit messy and someone has to tidy it up.