Hatstand
Biggest audience over 100,000  if shouting "Juan Two" into a microphone on Glastonbury's Pyramid stage counts?

 
Musta been fun regardless - Is it like giant loud?
 

giant crowded, but it feels fairly isolated on stage volume wise.
Had to allow at least 10 minutes to get from the stage to the F.O.H. desk though!
 
I have played bollock naked in front of 10,000 though. Glad I am a bass player and not a ukulele player

I actually share one with Randy.  Buck Dharma.  When we opened for Blue Oyster Cult (during my couple weeks of fame - LOL).  He even gave me a few playing tips (much needed tips!).
 
Music-wise, I doubt I've been in front of more than a couple of hundred (including my one, extremely brief, on-stage moment in Vegas).  
 
In other areas, I've been on ESPN twice (darts), was on the cover of a magazine as a teenager (speed skating), was part of a stupid radio station spectacle at an indoor monster truck event swimming through the mud pit in front of over 10,000 people (I made $1,050), and (in addition to the above), I've been on stage in Las Vegas in front of at least a couple of thousand people (for darts).  For seven years I was the director of the Oregon Open Dart Tournament (the longest running such event in the U.S.).  This put me in front of several hundred people.  Then there are the other events I made it to the stage in around the country.  Oh yeah, I even won a hardbody contest at a Red Onion nightclub once (with over 200 people watching).

I guess I didn't mention because I don't know how many- but 
when I was 8 or 9 yrs old I played my guitar on TV - for the Jerry Lewis Telethon.
 
I had a blast. On the back side of the stages were vendors. All the free food and drinks one wanted and I got see how "things" worked for live TV.
I remember getting a hot dog and while eating it two guys on either side of me started tapping and whistling the theme to "My Three Sons"...I looked up and it was Robbie from the show and Sammy Jackson from "No Time For Sergeants". Robbie ask if he could have my hot dog....sure, ...he wiped the mustard off my face and told me to go get my guitar ready at stage 3. (three stages setup)
My teacher was playing backup guitar and when we started the tune she wasn't in tune so I stopped and turned to her to tune up. They cut to the host, which I don't recall and while he explained I had to tune her guitar. She was to nervous. They switched back on my thumbs up and I played the tune. Cool gig that I enjoy recalling.
The first of only two televised so "how many?" ...I'll never know.
 
I know that a lot of kids at school saw me...I remember taking a lot of teasing about it and was glad when they forgot.
( and I'm having a deja vu or have typed this here before...weird either way me thinks)
 

Spacey's post has me wondering about how different the current generation has things.  Back in our day, when we did something embarrassing, usually it was forgotten soon after (unless a mother saw it in which case it would be brought up at inappropriate times for the rest of her life!).  Now, it seems like everything is caught on camera so bad moments can last forever...