Nicole Richie Celebrated Her 30th Birthday: She Puts Complex Life Behind Her

American fashion designer, author, actress, Singerand television personality and rocker wife Nicole Richie celebrated her 30th birthday Wednesday 'September, 21'. And apparently is was a popular one.

Nicole Richie writes to her 2 million Twitter followers, 'I can't believe the outpour of birthday love I am getting on twitter today! From the bottom of my heart 'and the top', Thank You So Much!'

The reality star is probably hoping her 30s are simpler than her 20s. That was a period of weight issues, drug arrests, DUI charges and a very short '82 minutes to be exact' jail sentence.

Since then, Nicole Richie has cleaned up her act. She married Good Charlotte singer Joel Madden and no doubt spends much of her energy raising their children Sparrow and Harlow. Richie will soon be back in show business as a celebrity mentor on the upcoming NBC reality show 'Fashion Star'.

Here's hoping 'The Simple Life' star Nicole Richie's birthday was 'easy like Sunday morning'.