21. This one made quite a few headlines. Sometimes performers really get into their own music. The lyrics can be so captivating that they may end up forgetting where the stage ends. Such was the case with Iggy Azalea. The rapper went plummeting toward the ground when she was rehearsing prior to the show. Surely enough, she didn’t make that mistake twice. She was extra aware during the real performance. Better when practicing than in front of live television, right?