It was around this time that Nicole was subjected to anorexic rumours after she became worryingly thin.
She also lived a party girl lifestyle with her childhood friend (and fellow socialite) Paris Hilton as her sidekick.
Nicole was forced to slow her partying lifestyle down completely after she was arrested for driving under the influence of drink and drugs in December 2006.
Nicole was sentenced to serve 4 days in prison in the August 2007.
Joel Madden took to Instagram late Wednesday night (December 21) to share a picture of himself along with wife Nicole Richie, her dad Lionel Richie, and twin brother Benji with wife Cameron Diaz.
Joel and Nicole have been together since 2006 and have two kids together – Harlow, 8, and Sparrow, 7 – and married in 2010.
Talking about the influences behind Harlow's baby name choice, Nicole explained, "I wanted a hippy name but Joel wanted something biblical.
Harlow's a cool name because it feels like a classic name at the same time," she said.
Nicole was often seen flaunting her baby bump and seemed to embrace her changing body by showing it off in a bikini on beaches such as Hawaii and Mexico before she gave birth.
Nicole was officially adopted aged 9, with Quincy Jones and Michael Jackson named as her godparents.
After years of living the party lifestyle and a stint in rehab for her drug addiction, Nicole Richie got her feet back on the ground when she met her future husband, singer, Joel Madden.
The healthy birth of my child is my no.1 priority." Nicole also revealed that she was planning on keeping any chemicals and drugs out of her body completely - including pain killers during labour!
It's rumoured that she wanted a natural birth and "didn't want to take aspirin or anything to ease the pain of labour." A few months before the birth, Nicole was treated to a themed baby shower in Beverly Hills.Nicole was in labour the same time as fellow celeb mum-to-be Christina Aguilera and gave birth just down the corridor from each other.