Open up this this picture of the beam and save it.
Open up the picture you want to use. Get mine here.
Open up the picture of Selena in Photofiltre. Go to Edit >> Define Pattern.
Using the dropper tool select a color from the picture of Selena or pick a color from the color palette. Now open the picture of the beam. Go to Edit >> Paste Special >> Mask. Your beam should have changed from black to whatever color you picked.
Now go to your picture of Selena and go to Edit >> Paste Special >> Mask. Resize the selection and make it smaller so that it fits with your picture and looks right.
Hit Ctrl-D twice to make the selection go away.
Now using the clone tool erase the alternating parts of the beam on top of Selena’s body.