Paste a Photo Inside a Selection
Open the picture of the daisy below in Photoshop:
Next open the photo that you want to use to insert into the flower above. I used this cute baby photo I found online.
Now you just want to use the head part of the photo, getting rid of the background and shoulders. Select the Magnetic Lasso Tool:
Zoom in on the photo using the magnification tool .
Click around the baby's head to select it. When you are done your selection should look like the photo below. If you make a mistake, simply click the delete button to deselect your last selection:
Now click Ctrl + C to copy the selection to the clipboard. Click on the flower picture and select the ellipse marquee tool:
Click in the center of the flower and with the Alt key depressed pull out from the center to create a selection. FYI: You can press the spacebar key to move the selection while sizing your selection.
Then select Edit > Paste Special > Paste Into:
How cute is this?