Tīng dào zhège xiāoxi hòu, tā lèng zài yuándì fāshǎ.
After hearing the news, she stood frozen on the spot, dazed.
Tips
usage
发傻 describes a momentary state of daze or absent-mindedness, not actual foolishness. It is distinct from 犯傻 (to do something foolish) which implies a deliberate but misguided action.