I wonder if she tinkered with roids or HGH. She lost a lot of baby fat and her jawline expanded. She also had some dental work done to fix a gap. It wouldn’t be uncommon.
http://www.590klbj.com/EI/T/Pics/Channels/KLBJ-AM/jessica.jpg
Now Asslee (as Perez calls her) is the patroness of 'good' plastic surgery. Her new nose has rave reviews :)