Complex sentence: Enrique Iglesias also made his "CityVille" appearance in October 2011 giving players a task to build Enrique's Euphoria Arena which is an attraction in "CityVille" and an avatar of Enrique can be seen performing while it is open.
Split into simpler sentences: Enrique Iglesias also made his "CityVille" appearance in October 2011, giving players a task to build Enrique's Euphoria Arena. The arena is an attraction in "CityVille", and an avatar of Enrique can be seen performing while the arena is open.