There wasn't ever anything REALLY terrible at any concert I've been to, but here's a few things:
- Ashlee Simpson at Cypress Gardens (old theme park): Only performed for 45 minutes and it was hot as HELL outside, everyone was sweating and it was kind of awkward overall. She still did great, though.
- A lot of concerts I've been to: Uncomfortable seats / people overcrowding my seat next to me.
- artRAVE opening night: Lady Starlight as opening act

Plus she was on for longer since Gaga was late.