re: Bands you've seen that got bigger than the band they opened for?

1993 - they had a country/rockabilly festival at Cynthia Woods Pavillion near Houston. Dwight Yoakam was the headliner and they probably had six other acts on the main stage that day.

I went to grab a beer at the concession stand and they had a very small little side stage near the beer sales. I stood by myself and listened to Keith Urban play a few songs. Literally I was the only person paying attention to him.

Now I would never say Keith is bigger than Dwight (although he has a lot more #1 singles, but Dwight has him beat in album sales and being cool), but he was easily bigger than the other five acts that played that day.