Justin Timberlake and Jessica Biel Wedding: Vegas Bachelor Party Kicks off Celebration

While rumors have it that a Justin Timberlake and Jessica Biel wedding is due to take place sometime before the end of this year, Timberlake took to Las Vegas with a group of close guy buddies to kick-off a dance-heavy and seemingly well-behaved bachelor party celebration. Sources claim that Timberlake and his crew hit up the Wynn Hotel in Vegas on Thursday, where they enjoyed a nice meal at the Sinatra restaurant before dancing it up at the popular nightclub Tyrst.

The celebrity couple has been dating for five years - the "Sexy Back" singer proposed to Biel in the mountains of Jackson, Wyoming in late December. They have remained tight-lipped about wedding plans, but rumors about their marriage have still blown up like crazy. Some sources claim that they had a secret ceremony in Wyoming back in August (apparently not true), and now some reports have it they'll share vows in Italy next month.

Whatever the case, Timberlake was definitely celebrating his last days as a single man in Vegas this past week. One rep claims the 31-year-old spent the night with 25 pals, sipping on his own 901 Tequila and dancing into the wee hours of the morning to the tunes of DJ Spider.  While the club was packed with beautiful models, one inside source tells Us Weekly that the boys were very polite - Timberlake "was a good boy" and throughout the night "it was just him and his guys" having a good time. Timberlake was supposedly smiling the whole time while busting some moves wearing a bowtie and fedora.

It is unknown whether Biel had a similar party with her girlfriends, but since Timberlake celebrated his bachelor party just this Thursday, many now believe that the wedding will take place very soon, maybe even today, Sept. 22! Stayed tuned for news on the future "Mr. and Mrs. Timberlake!"