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From a shark flashing a toothy grin to a macaque caught monkeying around, these hilarious pictures reveal that some animals know how to have a laugh.

Beaming broadly from ear to ear as they bring in 2012, these creatures prove they have a sense of humour as they pose happily for the camera.

Among the cheery creatures are a happy hippo and an exuberant Gibraltar ape, who is clearly more than happy to pose for a picture or two.