Complex sentence: The single also reached number one in twelve other countries across the world including Australia, Canada and Japan, it was the top selling song of 2007 worldwide, Its music video had YouTube record becoming the most watched video of all-time by July 2008.
Split into simpler sentences: The single also reached number one in twelve other countries across the world including Australia, Canada and Japan. The accompanying music video broke YouTube records, becoming the most watched video of all-time by July 2008.