Justin Timberlake made staff members sign a gagging order during the launch of his latest William Rast clothing line at New York Fashion Week, it has emerged.

The singer reportedly demanded all employees at the Cedar Lake Theater sign a document to stop them from revealing inside information about him.

“Justin made everyone sign an agreement not to gossip about him,” the Daily Star quoted a source as telling New York Post.

The insider added: “Then, three-quarters of the entire venue was closed off for him, so all the stylists were forced to work on 31 models in a tiny area, causing tempers to flare.”