The notorious Cirque du Soliel show "O" debuted at the Bellagio over 20 years ago.
With shows going on seven nights a week, they completed their 10,000th performance this September.
The Bellagio has some special plans to celebrate the milestone.
At 3:30 p.m. on September 28-29 and October 12-13, cast members of the show will take over the Bellagio fountains, giving a special aerobatic performance inside the fountains for all onlookers.
The performances will be adaptations of two acts from the award-winning stage show.