Teen YouTube sensation Rebecca Black sings gleefully about the weekend in her Web video hit "Friday," – and now the 13 year-old has something even more exciting to crow about. "Friday" has been viewed online more than Lady Gaga's "Born This Way" and Justin Bieber's "Pray," Visible Measures, a company that tracks performance of Web videos said on Monday. Black's low-budget video, which the California teen made with a boutique record label, has generated nearly 100 million views on YouTube since it was posted online on Feb. 10. But Visible Measures said that including copies of the video, spoofs and...