Her appearance came as a long-planned surprise that had been one of Washington's worst-kept secrets.

Those data streams had always been the worst-kept secret in their family.

The secret invasion proved to be one of the worst-kept secrets in America.

But the worst-kept secret in football remained that way.

That drugs are being sold from this building is the worst-kept secret on the block.

But the sum has been something of an open secret for several years, and now it may be the worst-kept secret in Washington.

The worst-kept secret in the pop world this week has leaked.

It is probably the worst-kept secret in the advertising research business.

Perry did, and his was the worst-kept secret in the game.

The decision to close the plant to tours, announced a few weeks ago, had been the town's worst-kept secret.