Then and now views …

Nicole Richie celebrated her 30th birthday with a vacation in Cabo San Lucas, Mexico. She spent her sunny getaway hours rocking several sexy bikinis that showed off her new breast implants to their best advantage.

The former Simple Life reality star had the surgical procedure earlier this summer and hasn’t commented publicly, though her close pals were all in the loop on her decision.

According to a Richie confidant, the thin-framed actress made the decision to enhance her cleavage because the pregnancies took a toll and “breast-feeding totally killed what boobs she did have.”

Nicole and her husband Joel Madden, of Good Charlotte fame, have two children, a daughter Harlow, 3, and a son Sparrow, 2.

More before and after photos below:

Photos: WENN, Video Screen Grabs

ncG1vNJzZmivp6x7tbTEoaalpKmsvLCwxqiqrKGgY7CwuY6boK2slaOur7DBqKynnF9nfXJ9jmpnaGhhZLuqr86lnGaqmZi1qrGMm6memaOpeqq5z6WYp6yjYq%2Bmss6rnGaZnpl6orLTnqlmqJikwbC%2Fjg%3D%3D