So here's a list of things that theoretically could have been in an entry, but never have been so far. What more can you think of?
An entirely unaccompanied solo singer.... there have been two "a cappella" entries, but they were both 6-piece vocal groups.
An entirely spoken, as opposed to sung entry, though there's quite a few with pretty long spoken parts in it.
An entry with the vocal performer(s) entirely hidden - "Love Symphony" had the singer hidden for most of the time, until the end.
An entry with some kind of robot, or video displayed character as a performer, not necessarily without live human performers on stage. Ukraine 2012 had some dancing figures, but they weren't really a major part of it.
A lead performer of East Asian descent - there may have been some obscure one long ago that i don't know about, but i don't think so.
A performer being submerged in water, in one way or another - i'm surprised nobody's used some kind of pool or perhaps a transparent tank, but there's rumours we'll see water on stage somehow this year.....
An entry using the cameras as a part of the staging, like JEM in Melodifestivalen this year - Ukraine 2011 had a live camera being projected onto the screen, but they didn't move the camera itself in any way.
The same artist representing 2 different nations - i know it couldn't happen, and would probably break rules somehow, but it's still funny as hell to consider.
An operatic bass, or alto as lead singer - may actually have been some in the 60s or so, but not recently.
A midget artist - Lithuania had one in the finals a few years ago, and Alf Poier would probably have had one on stage if he had won for Austria in 2005.
A male-on-male kiss - surprised there hasn't been one yet, though there might have been one outside of the actual entries.
A female-to-male drag act - really surprised there hasn't been one yet.
An entirely unaccompanied solo singer.... there have been two "a cappella" entries, but they were both 6-piece vocal groups.
An entirely spoken, as opposed to sung entry, though there's quite a few with pretty long spoken parts in it.
An entry with the vocal performer(s) entirely hidden - "Love Symphony" had the singer hidden for most of the time, until the end.
An entry with some kind of robot, or video displayed character as a performer, not necessarily without live human performers on stage. Ukraine 2012 had some dancing figures, but they weren't really a major part of it.
A lead performer of East Asian descent - there may have been some obscure one long ago that i don't know about, but i don't think so.
A performer being submerged in water, in one way or another - i'm surprised nobody's used some kind of pool or perhaps a transparent tank, but there's rumours we'll see water on stage somehow this year.....
An entry using the cameras as a part of the staging, like JEM in Melodifestivalen this year - Ukraine 2011 had a live camera being projected onto the screen, but they didn't move the camera itself in any way.
The same artist representing 2 different nations - i know it couldn't happen, and would probably break rules somehow, but it's still funny as hell to consider.
An operatic bass, or alto as lead singer - may actually have been some in the 60s or so, but not recently.
A midget artist - Lithuania had one in the finals a few years ago, and Alf Poier would probably have had one on stage if he had won for Austria in 2005.
A male-on-male kiss - surprised there hasn't been one yet, though there might have been one outside of the actual entries.
A female-to-male drag act - really surprised there hasn't been one yet.