 At the Quahog Gay Pride Day festivities , in a raffle sponsored by Weenie and the Butt , Brian wins tickets to see Celine Dion in Las Vegas . As they prepare to travel , Stewie convinces Brian to use the new teleportation device he has been working on instead . Stewie 's device appears to have malfunctioned , and he believes it failed to work , when it instead created a duplicate set of Brian and Stewie which was teleported to Vegas . The real Brian and Stewie then travel by plane to Vegas . As the duplicated pair check into the Bellagio hotel , their luck makes itself present immediately with the duplicated Brian winning a large jackpot at the slot machines near the entrance . The real Brian and Stewie arrive to find their room has been already taken . As the duplicated pair have the time of their lives , the real pair find themselves in a third @-@ rate hotel . Trying their luck , they quickly lose all of the money they brought . 
