Probably one of my favourite commercials in recent years. Not only does this Discovery Channel have a super catchy jingle (Boom de ah da, boom de ah da, boom de ah da, boom de ah da), it's also got the educational channel's presenters and stars singing along and about what they love. Mike Rowe, the host of Dirty Jobs, crawls in a sewer while singing: "I love real dirty things", and Man Vs. Wild's Bear Grylls does his part with: "I love arachnids", while holding up a big, scary-looking tarantula.

Funny, heart-warming, personal and 100% Discovery Channel.