Complex sentence: The dancing and singing was more crisp and (seemingly) better rehearsed than previous episodes, and the Gibb characters closed the sketch by rapping the lyrics of Rappers Delight over the the theme song background.
Split into simpler sentences: The dancing and singing was more crisp and (seemingly) better rehearsed than previous episodes. The Gibb characters closed the sketch by rapping the lyrics of Rappers Delight over the the theme song background.