Just a few months after the ice bucket challenge craziness, there is another challenge that has gone viral globally. But this one has been repeating annually for the last couple of years. What are we talking about? The Movember. A compound of two words – “mustache” and “November”, Movember is an annual event held to raise awareness of men’s health issues, especially prostate cancer. Those who want to take part in the event (so called “Mo Bros”) have to grow mustache during the entire month of November. Apart from growing facial hair, people can also donate money to the Movember Foundation Charity that aims to increase early cancer detection, diagnosis and effective treatments, reduce the number of preventable deaths and encourage men to be aware of family history of cancer and to adopt a healthier lifestyle. But it is not just ordinary people who grow their mustaches in November, many world-famous celebrities of all kinds have also taken part in the event. To see how the facial hair work for them, check out these 25 “mo pictures” of some hilarious movember mustaches.