1. ITV Report

Downton Abbey stars 'singing One Direction song' goes viral

Downton Abbey meets One Direction Photo: ITV

A YouTube video cutting Downton Abbey footage to make its actors appear to "perform" One Direction's What Makes You Beautiful has had more than 86,000 hits in a week.

Compare it with the original by One Direction:

On Wednesday, David Cameron will star in a music video with One Direction for their Comic Relief single One Way or Another (Teenage Kicks).