One corner of his mouth lifted, though she could not call it a smile.

One corner of his mouth lifted in a small smile.

A corner of the paper lifted an inch, dropped again.

One corner of his mouth lifted, as if to say are you kidding me?

The corners of his mouth lifted slightly as he looked at her.

He gave me a quick blue glance, and the corner of his mouth lifted slightly.

The corners of her mouth lifted while she, too, stopped to study him.

The corners of her mouth lifted in a wide, beautiful smile.

A corner of his mouth lifted in a near smile.

The corner of her lip lifted in almost a smile.