Here is the full list of all 30 Keyhole Spy: Frozen Hotties achievements.
Unfreeze Christina
Complete 15 puzzle with Hanna
Win, playing for Hanna
Unfreeze Hanna!
Win, playing for Christina
Complete 15 puzzle with Christina
Unfreeze Elsa
Win playing as Elsa
Complete 15 puzzle with Elsa
Unfreeze Gerda
Win playing as Gerda
Complete 15 puzzle with Gerda
Unfreeze Astrid
Win playing as Astrid
Complete 15 puzzle with Astrid
Unfreeze Viveka
Win playing as Viveka
Complete 15 puzzle with Viveka
Unfreeze Carolina
Win playing as Carolina
Complete 15 puzzle with Carolina
Unfreeze Ingrid
Win playing as Ingrid
Complete 15 puzzle with Ingrid
Unfreeze Erika
Win playing as Erika
Complete 15 puzzle with Erika
Unfreeze Marta
Win playing as Marta
Complete 15 puzzle with Marta