Digital Art

Drew Barrymore Illustration
Software: Adobe Illustrator CS version

Create New document as per required size. Go to File - Place, browse your image and place it on art board, lock it.
Let's start with face, create new layer and name it face, create a rectangle box according to face size, double click on the face layer. From the option box deselect preview mode and activate the Dim images.

Step 1 Illustration

Next step is creating face mesh, select mesh from tool box,  create mesh according to face structure, use Direct selection tool (A) to edit mesh (you should create mesh using rectangle box for the better result).