Use Smart Objects to combine the power of Photoshop with the versatility of RAW
Now make a selection of the balloons. Since they’re pretty clearly defined, type W to grab the Quick Selection tool and make a rough selection; hit Q to switch to Quick Mask mode to use the Brush tool to perfect it, then smooth it with Refine Edge. (Or use your favorite selection method.) Add a mask by clicking the Mask button in the bottom of the Layers panel.