He lost his smile and looked away, past the kitchen, past the living room.

She'd lost her smile for a moment, but now it returned, with a greater warmth than friendship.

Although she sees much sorrow, the sister never seems to lose her smile.

Her face lost its habitual smile, for the first time since they'd met.

The grinning man lost his smile for a moment, seemingly put off balance.

She lost her smile as we moved to the tenth tee.

Somehow, she managed to keep track of everybody in the full room without losing her smile.

As I went on staring without speaking, her mouth lost its little smile.

Then he lost his smile and indicated some other mercenaries at the far end of the room.

A girl comes up with one drawing (a smiling face) and say that he has "lost his smile".