Complex sentence: On April 21,2014, it was announced that "Blurred Lines" was the most downloaded song of all time in the UK, with digital sales of more than 1.54 million, a total since surpassed by Pharrell Williams' own single "Happy".
Split into simpler sentences: On April 21,2014, it was announced that "Blurred Lines" was the most downloaded song of all time in the UK, with digital sales of more than 1.54 million. In April 2014, "Blurred Lines" was revealed as the most downloaded song in UK chart history, though it has since been overtaken by Williams' own single "Happy".