Extreme Makeover: World Edition - S7-E12
Trivia: When the demon "in a bad suit" hurls a fireball Piper vanquishes him, and in the next shot that fireball hits the building across the street. Note this is the Bay Mirror where Phoebe works, but the newspaper's plaque has been removed from the doorway. (00:26:10)
Answer: "Hush, Hush, Hush" Paula Cole.