Two of our favourite ladies were out and about wearing purple on Tuesday - Christina Aguilera at the 40th Anniversary American Music Awards nominations and the Queen at a Diamond Jubilee monument unveiling ceremony in Windsor.
Examining the Crayola colour chart, it seems that QE2 has opted for a coat and hat combo in the rather aptly named "Purple Mountain's Majesty" shade, while Christina donned a figure-hugging number in "Cyber Grape".
But, while the Queen's tried and tested classic style met with blanket office approval, the contouring or fabric distortion on Christina's dress is doing all manner of unflattering things to her figure.
Royal wedding, 1947
The Princess Elizabeth II and Philip The Duke of Edinburgh pose on their wedding day in Buckingham Palace. Thebride's gown was designed by Norman Hartnell.
Princess Anne, 1950
Princess Elizabeth smiles as she is holds newborn Princess Anne.
Royal family, circa 1951
The Royal British couple, Queen Elizabeth II, and her husband Philip, Duke of Edinburgh, with their two children, Charles, Prince of Wales, and Princess Anne.
Queen Elizabeth II, circa 1953
Queen Elizabeth II wears a white, embellished, tulle gown.
Queen Elizabeth II in full regalia during her coronation.
Queen Elizabeth II wears white gloves and a dark green dress.
Queen Elizabeth II arrives at King's Cross railway station with her four Corgis dogs after holidays in Balmoral Castle in Scotland.
Windsor Castle, 1969
Britain's Queen Elizabeth, her husband Prince Philip, their children Princess Anne and Prince Charles are gathered for a lunch.
Queen Elizabeth II of England attends a horse race at Longchamps racecourse wearing a checked purple jacket.
Queen Elizabeth II on a tour of the Chelsea Flower Show.
The Queen's birthday, 1976
The Queen Elizabeth II poses for her 50th birthday wearing a blue dress.
Queen Elizabeth II smiles wearing a red jacket and blue hat with red detail.
Britain's Duke of Edinburgh, Eva Koehler, Queen Elizabeth II and German President Horst Koehler pose at the Zeughaus Palace. The Queen wears a lavender gown.
Queen Elizabeth II attends a State Banquet in Buckingham Palace in honour of Brazilian President Mr Luiz Inacio Lula de Silva.
Britain's Queen Elizabeth II matches her umbrella with her purple outfit.
Kampala, Uganda, 2007
HRH Queen Elizabeth II arrives at the Serena Hotel for The Queen's Banquet for Commonwealth Heads of Government.
Bratislava, Slovakia, 2008
HRH Queen Elizabeth II laughs as she chats to a player before an ice hockey match wearing a coat with fur trim.
HRH Queen Elizabeth II attends the Remembrance Sunday service wearing all black.
Queen Elizabeth II visits a garden at the Chelsea Flower Show in London, wearing a blue and purple suit.
Queen Elizabeth II attends Royal Ascot Ladies Day wearing a lavender jacket and matching hat with rose detail.
Queen Elizabeth II wears pink to visit a school.
Royal wedding, 2011
The Queen wears a yellow ensemble for the marriage of Their Royal Highnesses Prince William Duke of Cambridge and Catherine Duchess of Cambridge at Westminster Abbey.
Queen Elizabeth II waves to the public wearing a turquoise blue ensemble.
Queen Elizabeth II attends a service for the Order of the British Empire at St Paul's Cathedral.
Queen Elizabeth II, wearing a pink ensemble, and Catherine, Duchess of Cambridge arrive at St Pancras station.
Queen Elizabeth II wears lemon.
Queen Elizabeth II arrives to visit Media City in Salford wearing pink.
Queen Elizabeth II wears a turquoise blue ensemble while Princess Beatrice wears black.
Queen Elizabeth II in the House of Lords wearing her crown.
Britain's Queen Elizabeth II laughs wearing a white gown and embellished jacket.
Actress Joan Collins, singer Shirley Bassey and actress Kate O'Mara meet Britain's Queen Elizabeth II.