Photo Credit: Denise Truscello/Wireimage

Mayor Oscar Goodman and former “Girls Next Door” star Holly Madison posed for pictures in front of the Welcome to Las Vegas sign to kick off summer, Las Vegas style! Mayor Goodman made his official start of summer declaration in front the sign, to mark its 50th anniversary. A bikini fashion show was also held, showing off custom made swim wear from each decade since the sign was first put up! Then, 300 women also took part in an effort to gain the world record for the largest bikini parade.  They marched up and down the Las Vegas strip.