/sing, aka the "sing command" is a relatively new chat command here on E2 which can be used in the chatterbox to put your words in italics and surrounded by a randomly assorted selection of musical notes.
Activate the command thusly...
/sing Happy Birthday to you!
<mauler> ♫♪ Happy Birthday to you! ♫
Use this command for fun and profit, but for goodness sake, DON'T use it to sing that one song by that terrible band that you always listen to.