Hawt = A late 1940's and early 1950's acronym for "Having A Wonderful Time."
Now the word is used on the internet as slang for something reeeeally hot.
The 2013 Grammy Award for Best Dressed on the night, without a shadow of a doubt, went to Rhianna! How incredibly glamourous did she look in this beautiful custom-made Azzedine Alaia dress, accessorised with Neil Lane jewelery, Manolo Blahnik heels and a bright red pout? Dazzling and show-stopping. A red HAWT Valentine’s Day tribute.