What Was The Largest Concert You Ever Attended?

I think my largest show was the Rolling Stones on their Bridges To Babylon tour at the Texas Motor Speedway.  I did go to one Texas Jam ('86 with Van Halen & Dio) and my second ever concert was at Anaheim Stadium (where the Angels play) that was Skynyrd/Nugent/Foreigner/Reo Speedwagon and T-Rex.  I later saw Bob Dylan and The Grateful Dead at the same place.

So, let's not confuse the size of the band or the size of the lineup with the thing we're really discussing here-the amount of people there. Sure you may not have been able to count them, but what show seemed like the biggest to you? If you do have an idea of how many people were there, please throw that in too.