Make-up free Cameron Diaz shows off bare-faced beauty as she enjoys a girls' day of pampering with sister-in-law Nicole Richie

She recently launched a guide on how women should care for their health.

And Cameron Diaz was practicing what she preached as she enjoyed a day of pampering with sister-in-law Nicole Richie and her daughter Harlow Madden, eight, in Beverly Hills on Sunday.

The 43-year-old actress rocked a demure, summery look for the outing in a calf-length violet dress that was adorned with delicate flowers. 

Scroll down for video

Girls' day out: Cameron Diaz was practicing what she preached as she enjoyed a day of pampering with sister-in-law Nicole Richie and her daughter Harlow Madden, eight, in Beverly Hills on Sunday 

Girls' day out: Cameron Diaz was practicing what she preached as she enjoyed a day of pampering with sister-in-law Nicole Richie and her daughter Harlow Madden, eight, in Beverly Hills on Sunday 

But the screen star still knew how to make the most of her fabulous figure, as she cinched in her tiny waist with a simple wrap belt.

Sticking to the basics, Cameron teamed her pretty gown with a pair of beach ready flip flops and she tied up her golden tresses into a chic up-do, which exposed her flawless features. 

And she embraced her natural beauty as she opted to go makeup free and showed off her enviably dewy complexion. 

Retail therapy: The 43-year-old actress rocked a demure, summery look for the outing in a calf-length violet dress that was adorned with delicate flowers 

Retail therapy: The 43-year-old actress rocked a demure, summery look for the outing in a calf-length violet dress that was adorned with delicate flowers 

The girl gang looked to be having a great time as they hit the shops and each carried a number of bags full of their purchases. 

Although Nicole's daughter, Harlow, matched with her aunt in a cute taupe dress, the socialite cut an altogether more bohemian figure.

The 34-year-old former reality star - the daughter of music legend Lionel Richie - stepped out in a vibrant jumpsuit that she wore in shades of blue, green and gold. 

Pamper time! Earlier in the day, Cameron was seen treating herself to a manicure

Pamper time! Earlier in the day, Cameron was seen treating herself to a manicure

Red hot! As she went shopping, Cameron was seen to sport a sleek scarlet polish on her toes

Red hot! As she went shopping, Cameron was seen to sport a sleek scarlet polish on her toes

And the fashionista couldn't be seen without her trademark shades, which she held pensively in her mouth. 

Similarly to Cameron, Nicole also wore a pair of simple slip on sandals.

But it's no surprise that the women wanted to show off their feet as earlier in the day Cameron was seen to be enjoying a pedicure in the area.

Ready to go! The actress was ready for action after she enjoyed her treatment

Ready to go! The actress was ready for action after she enjoyed her treatment

And as she girls enjoyed their shopping trip the Bad Teacher star sported a sleek scarlet polish.

Cameron married rockstar, Benji Madden, last year - making her sister-in-laws with Nicole who is married to Joel. 

Cameron opened up to Andy Cohen's Sirius XM showRadio Andy earlier this year about how she thought Benji was 'hot' when they first met through his brother Joel and his wife Nicole Richie.

'The first thing I saw when I first met my husband, I was like 'he's hot!',' she said.

The couple wed in an intimate ceremony in her living room last year, after a three-month engagement.

People would always tell her ' you just know' about finding love, she told Andy.

'I was always like, 'What does that mean … what does that mean?' Then I was like 'Oh, I get it, you just know when you know, like you're my husband.''

'Nothing matters now that I have my husband,' she said of past relationships.

'I don't even remember any of that. Like, that's the thing, that's how I know he's my husband because no one compares.'  

Happy couple: Cameron became a sister-in-law to Nicole last year, when she married Benji Madden (pictured)

Happy couple: Cameron became a sister-in-law to Nicole last year, when she married Benji Madden (pictured)