when someone smiles

[alpacinou]

I want to describe a situation when someone smiles. Can I use "lips curl into a smile"?

"I think men would line up to have a dance with you," he said.

Her lips curled into a charming smile.

 

[alpacinou]

And this:

The corners of her lips curled into a charming smile.

 

[Skrej]

Both are okay.

 

[Tdol]

Don't lips normally curl into sneers, etc?