School shootings are examined in a new run of films on PBS, starting with how a former Secret Service psychologist stopped 120 attacks.
Team Jessie J
There are some instances on TV you just can't prepare for as Jessie J found out during her group's performance of We Are Young by Fun on Saturday night.
As the song got underway, viewers saw the Price Tag singer indicate that she couldn't hear anything. 'My mic isn't on. I'm sorry," she cried. "I'm sorry to do this on live TV, can we start again because I want to make it perfect." Jessie J then apologised to viewers at home for the technical problem.
The next incident occurred later in the programme when young Becky Hill appeared to mouth a swear word on camera after forgetting the words to Seven Nation Army by The White Stripes. Presenter Holly Willoughby apologised, but Becky was clearly upset by her performance.
Find out how all the contestants performed on Saturday night in this gallery.
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