Thanks Neonstar3 for the first two facts, AshleyJohnson12 for the next two, and Starlingfall_Potato for the last!
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-Swiftpaw actually had a brother, Lynxkit, who was too weak to live.

-Breezepelt and Heathertail are actually cousins. Whitetail is Heathertail's mother, and is sisters with Nightcloud, who is Breezepelt's mother. 

-Kate suggested that she was thinking about making Sparkpaw's warrior name Sparkfire, but HarperCollins rejected the idea. Sparkpaw's name will not be 'Sparkplug' either.

-Vicky states that Squirrelflight didn't tell Bramblestar that the kits weren't hers so he would love them like they were his.

-If Hollyleaf hadn't of saved Ivypool from Hawkfrost, she still would have won.