Former Loose Women panellist Lynda Bellingham will also pick up an OBE.The actress, 65, who late last year announced she had been diagnosed with cancer, said her award was "a fantastic way to move forward" following a"tough year".
Katherine Jenkins has performed two special concerts for British troops at Camp Bastion in Afghanistan.
Jenkins even took time out to sing Happy Birthday to Craftsman Bryan Larkin, who turned 22 while on tour. The serviceman said the impromptu performance was "the last thing I expected".
Jenkins, who is patron of the British Forces Foundation, said, "It is an immense honour to be able to perform for the men and women of our Armed Forces and I will continue to do so for as long as they want me".
Welsh Opera singer Katherine Jenkins has revealed that she sleeps with her eyes open, due to a condition she has lived with since she was a child.
Ms Jenkins,33, suffers from Nocturnal Lagophthalmos, which means sufferers are unable to close their eyes fully when they sleep.
"My eyes don’t close properly - they are always at least half open - and when I go to sleep I look like I’m still awake," she said in a recent interview.
"And I don’t really have dreams either. My mum would always say: 'Katherine, are you awake or are you asleep?’"
Lagophthalmos can be caused by factors including facial paralysis, stroke, infection, trauma and surgical procedures.
Sufferers can treat the condition by using an ointment at night or by taping their eyelids closed with surgical tape, although use of ointment may cause blurry vision and surgical tape can cause skin irritation.
Welsh singer Katherine Jenkins said she was running the London Marathon in memory of her father and to show solidarity to people affected by the bombings in Boston.
She said: "Like everyone else, it was just so devastating to see that on the news. But I think we all feel more than ever that we want to do this and show our support for Boston."
The 32-year-old, who has raised over £22,000 for a cancer care charity, added: "I wanted to run it in support of Macmillan. My father passed away from cancer when I was 15 and the Macmillan nurses came and they were wonderful."
She said: "I really don't think of myself as an athletic person at all. I never in a million years thought I would do this. I'm glad that I am, but I am nervous."
Opera singer Katherine Jenkins sang God Save The Queen after the first race of the day, the John Smith's Aintree Legends Charity Race.
The Welsh mezzo-soprano said: "As a child, I remember my parents placing nominal bets and us all cheering on the horses from our living room. To be involved in such an important milestone for the race is a great honour and something I am proud to be a part of."
Welsh opera singer will be a contestant in the new series of the US show Dancing With The Stars. She will join soul singer Gladys Knight, tennis player Martina Navratilova and Disney Channel star Roshon Regan.
31-year-old Katherine is newly single after splitting with Blue Peter presenter fiance Gethin Jones in December. She will perform her first routine on March 19th.