Britney Spears married her fiance Sam yesterday but they had a wedding crasher, Jason Alexander, Britney's first husband. They got hitched in 2004, but the marriage was annulled 55 hours later.
Somehow, Jason made it all the way into the wedding tent, even though security kept trying to make him leave. He also live-streamed the whole thing, so you can actually see what it looked like inside. He was arrested.