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Can't see the film? Click here to watch.

Four months ago we asked for the most pessimistic One Show viewers to contact us via our Get Involved pages, to take part in an experiment to see if we could make them happy.

We were inundated with people who didn't think we would pick them, but One Show viewer Tony seemed to be the most negative of the lot.

In today's Stress Week film The One Show's Michael Mosely met up with Tony to see if he could change his outlook by sending him to 'Happiness School'.

Dr Alex Linley gave Tony two simple things to do for just one week. The first is to list his personality strengths and use one of them in a new way each day. The second is to write down three good things that happen each day.

To find out what happened to Tony check back tomorrow.

If you haven't already, why not take our Stress Test?
See also: Read all our Stress Week blogs.
See also: Watch our exclusive Stress Week videos.

What is happiness to you? What makes you happy? Are we even meant to happy? Is happiness overated? Are you grumpy and proud?! Tell, us please.