Revealing mistake: When Piper blows up the painting you can see the hole used to put the charge into to blow it up. (00:57:40)

Revealing mistake: When Phoebe goes to sign her papers at the end, she spells her name as Pheobe. (01:22:45)

Revealing mistake: When Piper blows up the painting you can see the hole used to put the charge into to blow it up. (00:57:40)

Revealing mistake: When Phoebe goes to sign her papers at the end, she spells her name as Pheobe. (01:22:45)
The Importance of Being Phoebe - S5-E11
Continuity mistake: When Phoebe is lying on the ground and is supposed to be unconscious, when Cole goes to pick her up you can see Phoebe throw her arms around his neck. (00:29:15)
Trivia: Holly Marie Combs's real life pregnancy with her son Finley Arthur Donoho was mirrored by Piper's pregnancy with Chris in this season.
Answer: "Hush, Hush, Hush" Paula Cole.