Susan Boyle Sings Memory on Britain's Got Talent [YouTube Video]

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So long has passed since Boyle did the US TV circuit - from Oprah to Good Morning America and everything in between - that its possible audiences may tire of her.

Susan successfully got through to the finals after tonight's semi-final performance, but as we learned with Adam Lambert on American Idol, huge internet buzz doesn't always mean you'll be the contest's eventual winner.

It forces us to consider, too, that despite social media's many admirable achievements in extending democracy and its threat to autocratic regimes, not all of its uses are quite as high minded.

For more great YouTube clips, see Top 20 YouTube and Video Memes of All Time