Queen's Jubilee: Fashion of the flotilla

Britain's Kate, Duchess of Cambridge wore a bright red Alexander McQueen dress to the celebrations on the River Thames for Queen Elizabeth II's Diamond Jubilee, the anniversary of the monarch's 60 years on the throne. Some critics wondered if Prince William's wife upstaged the queen, who wore all-white for the River Pageant.

Complete coverage: The Queen's Diamond Jubilee

Catherine, Duchess of Cambridge, wears a hat with flower cutouts and form-fitting knee-length dress accented with a pin and drop earrings to Diamond Jubilee Pageant on the River Thames, Sunday June 3, 2012.

Complete coverage: The Queen's Diamond Jubilee

Catherine, Duchess of Cambridge, carried a plush bag and plaid scarf to finish off her red look.

Complete coverage: The Queen's Diamond Jubilee

Britain's Kate, Duchess of Cambridge, with uniformed brothers Prince William, center, and Prince Harry before boarding the royal barge to joined the Queen for the Diamond Jubilee Pageant on the River Thames in London Sunday June 3, 2012.

Complete coverage: The Queen's Diamond Jubilee

Pippa Middleton sported a cream and navy buttoned jacket as she and James Middleton braved the rain from the Spirit of Chartwell during the Diamond Jubilee Thames River Pageant on June 3, 2012 in London.

Complete coverage: The Queen's Diamond Jubilee

Queen Elizabeth II wore all white for her Diamond Jubilee celebrations on the River Thames on Sunday, June 3, 2012. Her hat and dress were adorned with gold and silver and she wore a stunning diamond-encrusted broach.

Complete coverage: The Queen's Diamond Jubilee

Queen Elizabeth II wore pearl and diamond earrings to finish her all-white ensemble.

Complete coverage: The Queen's Diamond Jubilee

Queen Elizabeth II was prepared for the day's rain. She wore gloves and a dress with a matching buttoned coat.

Complete coverage: The Queen's Diamond Jubilee

Camilla, Duchess of Cornwall attends the 'Big Jubilee Lunch' in Piccadilly ahead of the Diamond Jubilee River Pageant on June 3, 2012 in London. She wore a belted trench coat and accented the look with pearls.

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Later in the day for the main event, the Diamond Jubilee Pageant on the River Thames, Camilla, Duchess of Cornwall stepped out on Prince Charles' arm dressed in cream with a large cream-colored hat.

Complete coverage: The Queen's Diamond Jubilee

A closer look at Camilla, Duchess of Cornwall's Diamond Jubilee ensemble reveals silver thread in the sleeves.

Complete coverage: The Queen's Diamond Jubilee

AP Photo/ Matt Grayson/Fulham Chronicle, Pool

Also seen at the Diamond Jubilee celebrations were Britain's Princess Eugenie, right, and Princess Beatrice. Known for sometimes over-the-top fashions, both women wore understated looks to the Big Jubilee Lunch at All Saints Church, Fulham, London, on Sunday, June 3, 2012.

Complete coverage: The Queen's Diamond Jubilee

Princess Beatrice attends the Big Jubilee Lunch wearing a black and white shift dress, a maroon cardigan and a Stephen Jones hat.

Complete coverage: The Queen's Diamond Jubilee

Princess Eugenie wore a pink Roland Mouret dress with a black Moschino cardigan to the Big Jubilee Lunch. She, like her sister, wore a Stephen Jones hat.

Complete coverage: The Queen's Diamond Jubilee