Faith looked sincere, but Sherrie didn't believe her for a moment.

But most of the smiles did not look very sincere.

They look so sincere that I feel different with them.

And because you were stupid enough to look sincere doing it.

The President had never looked more sincere than he did at that moment.

The words looked so sincere, sitting there on the screen.

The woman looked sincere enough, but looks could be deceiving.

His face looks sincere, but I know who I'm talking to.

He did not look sincere in his apology, but it worked.

People, and indeed things, looked more sincere on a horse.