My entry to 
Step 1: we need a naked cat picture and a picture of Julia
Step 2: cutout the part of Julia´s head and hair, clone it and paste the result onto the catpicture as a separate layer.
Step 3: Rescale and postion the face into the correct position.
Step 4: Use the remove brush and the right density/transparency to get rid of artifacts and to blend then raw toghether. Cut out the ears and preserve them on layers for later use. Smudge away the orignal catears on the "background" image.
Step 5: refine refine resqueeze, refine
Step 6: retouch the some skin wrinckles onto Julias face
Step 7: rescale. position and retouch the cat ears
@elgeko