Hah! I had no idea about B. Lively. ScarJo looked like a different person, (and yes, I'm aware there's a decade plus difference in those shots.)

Here are some more (Polaroids from a casting director). Jessica Alba, Halle Berry, etc etc. Have you seen these?

http://jezebel.com/5385792/before-they-were-stars--spot-the-nose-job