Shrek 2/Fridge

Fridge Brilliance

 * When the Fairy Godmother first sees Fiona (in her ogre form) she seems startled but not terribly shocked at her appearance and then proceeds to sing about how she's going to improve Fiona's life by changing her appearance and plying her with material objects. Then when she finds out that Fiona married Shrek, she's shocked and horrified and quickly takes off. Since she probably hadn't yet heard from Prince Charming that he'd failed to get to Fiona in time and she'd married someone else, she probably thought Fiona had married Prince Charming and they simply weren't each others' true loves so the curse still held her. No wonder she was trying so hard to make Fiona feel better: she probably thought Fiona was depressed about the spell not being broken and was trying to manipulate her into staying with Prince Charming!