Last week she undertook two "official" birthday engagements and on Saturday her husband threw her a champagne party at Highgrove, his private Gloucestershire residence, to which all her nearest and dearest were invited.
Her step-sons Princes William and Harry attended along with her own children Tom Parker Bowles and Laura Lopes.
It is exactly this strategy, creating bespoke, stylish pieces in an age of anonymous fast fashion trends, that has propelled Valentine's Marylebone atelier to reach a milestone 30 years in business, as well as attracting a loyal base of clients- one of the most notable being Camilla, Duchess of Cornwall. Despite his many affairs during their marriage which led to an eventual divorce in 1995, they remain good friends.
Twelve years after their controversial civil wedding, which followed years of public rancour over their relationship, the portrait makes clear that they are very much a partnership of equals as they move, albeit reluctantly, ever closer to the throne.
When they were married in April 2005 it was announced that Camilla would be given, what some saw as the lesser title of Princess Consort and not Queen Consort when her husband became King.More news: Hugh Jackman Playing Scar In Lion King Remake
A survey for the Mirror this weekend found 39% of people are content with having Camilla as Queen.
Ahead of her 70 birthday, an explosive biography about Camilla's life written by Penny Junor was released in extracts, claiming that Diana menaced her before two television interviews which rocked the monarchy.
In the soft-focus photograph, Camilla looks relaxed and happy, with her soft blonde hair do and natural make-up reflecting her low-key approach to style.
The Prince of Wales and Duchess of Cornwall will return to their duties in Devon and Cornwall later in the week.
CAMILLA was a picture of youth in this 70th birthday picture by Princess Diana's favourite snapper.