THE laughing baby. He even has his own wikipedia entry. Here’s what they say:

The Laughing Baby is an Internet neologism given to a YouTube viral video of a baby laughing. The video has become an internet phenomenon with over 6 million views^[2] (The “Hahaha ” version by BlackOleg, which is exactly the same as the original, was viewed for mais de 103 million times as of Sep. 2008). ^[3]Uploaded by a Swedish man with the pseudonym  spacelord72, ^[4]and later re-uploaded and popularized by another user known as BlackOleg, ^[5] the “Laughing Baby” is one of the few internet memes that have entered popular culture.^[1]

I wonder what else makes him laugh? (Most things, I imagine) ]]>