Open up the picture of Miley and a blank image in Photofiltre.
Using the Selection tool on the Ellipse setting, make a selection around any part of the picture.
Now press Ctrl-C to copy it and go to your blank image and paste it by pressing Ctrl-V.
Now go back to the picture of Miley and move the selection to a different part of the picture but make sure the part is close to the original selection.
Now go the blank image and paste it again. Now zoom in to about 500% and move the selection into place like mine:
Now make another selection on the picture of Miley.
Keep adding more “bubbles” as you want.
Now just make a selection around the entire “bubble” picture of Miley you assembled on the blank image and press Ctrl-C. Then press Ctrl+Shift+V.