The pretty princess wear the necklace become stone statue@

Mannequin, shot in the dark but this was about an egyptian princess who is turned into a shop mannequin awaiting her true love - if its not 'mannequin' please provide some further detail so we can help look for it. :)

Manniquin 2 Manniqun on the Move sounds like what you are talking about. She puts on the necklace and turns in to a statue and when taken off she turns back to normal, and any one else who puts it on turn into a statue until it is take off.