The most famous clown since Bozo, Ronald McDonald is the corporate mascot for the McDonald's fast food chain. Introduced in 1963, Ronald and his exceedingly weird friends (including the formerly four-armed and formerly evil Grimace, the sneaky Hamburglar, Birdie the Early Bird and the mildly disturbing Fry Kids) have been hawking fast food to the kiddies for decades.
Notably, Ronald McDonald (known as Donald McDonald in Japan due to linguistic issues) has become an Internet meme in Japan because of a series of commercials run in the mid-2000s featuring the themes "Ran Ran Ruu! (ランランルー！)" and "Donald's Gossip (ドナルドのうわさ!)" Various parodies and remixes have been created using video and sound clips from said commercials and popularized via YouTube and the members-only video-sharing site Nico Nico Douga.