Naked on stage
 

It is called Rameau Conclusion. Have not had time to do more research on that one, but there might be a scene of mass nudity on stage, including a more mature couple.

Naked on stage
 

The lovely Wiltrud Schreiner in a stage performance shown on Austrian TV channel ORF 2.

Bounce 'em, baby!
 

A brief clip of nude Brazilian Giorgia Conceição rehearsing a bouncy number...

These girls were definitely not classically trained...

Beglian Romy Louise Lauwers in D e S c h e p p i n g / T h e C r e a t i o n L i s a b o a.

Doris Uhlich

That's a video I ripped from an opera streaming site, saved with a confusing name, loaded to Zippyshare, and posted to the "Naked in a Play" thread a year and a half ago. It's from an opera called "Les Indes Galantes", by Rameau, that's been mentioned a few other places on this site. There's more info at the links, but all of the extreme amounts of nudity are in the "Conclusion" file, plus these two files from near the beginning of the performance. I also posted these files before, but those Zippyshare links have expired, so I'm reupping these files, to OCC this time...

Very good video quality, lots of very attractive women, fairly long, highly recommended. :D

that girl had some realy nice boobs

Rockb*tch
 

I think this fits here. They are nude on the stage nearly all the time. This is in the format of a documentary, so it has some interviews and offstage as well.

Striptease on stage
 

Don't know where this is from, but she does a full striptease and dance in front of a full crowd.