Justin Timberlake and Jessica Biel are finally getting married, and on Saturday the super cute couple celebrated their engagement at a Hollywood cocktail party. Justin and Jessica "danced and looked very happy", an eyewitness from the party reveals. "Justin and Jessica arrived at the party looking very excited. Jessica was stunning in a long dress with her hair down.", the source continues. Among the guests were celebrities like Ellen DeGeneres, Amy Adams and Timbaland. After some live music a DJ took over and played popular dancefloor hits. Sounds like a cool party to us! Congrats, Jus and Jess! (people)