Kate Middleton
Catherine, the Duchess of Cambridge, wearing an Alexander McQueen skirt and top, waves to members of the crowd as she arrives at the Playford Civic Centre in the Adelaide suburb of Elizabeth on 23 April 2014.Reuters

Kate Middleton, who is pregnant with her second child, is said to have ditched spray tans and glossy, semi-permanent highlights as they are a storehouse of chemicals.

The 33-year-old was recently seen sporting "strands of grey" hair when she stepped out for a shopping spree on Monday, according to The Express. Middleton reportedly opted for make-up free look and tied her hair in a ponytail. She was not seen flaunting her usual glossy locks and appeared "pale," as further reported by the website.

The Duchess of Cambridge has stepped out to shop at Peter Jones department store in London. She dressed her baby bump in a white coat and black scarf. She did her eye with winged eyeliner and added a punch to her look with a pair of sheer black stockings and a pale blue bag.

Meanwhile, Middleton will also be taking a trip to Caribbean island of Mustique, to celebrate her mother Carole Middleton's 60th birthday. She will join in the birthday celebrations with Prince George.

"It is a big birthday for Carole and Kate won't want to miss it. She has been saying she really is missing some winter sun," a source revealed to the website.

Prince William will not join Kate for her Caribbean vacation as he is busy preparing for his post at East Anglian Air Ambulance, something he will remain engaged in during his time at the countryside home, where the couple had reportedly shifted to as they plan to raise their kids away from the hustle-bustle of the London city.