Be careful with too much height at the crown of your head. Here, Jennifer Love-Hewitt has her hair piled atop her head, making her heart-shaped face a bit top-heavy. A better look would emphasize fullness at the sides of head.
The secret is balance out your chin, so you want to avoid styles that are top-heavy. Slicked-back hair shows off the face too much. You rarely see Jennifer Aniston with her hair slicked back and it's for a reason.
More on face shapes: