Queen Elizabeth II's 90-year-old husband Prince Philip, the Duke of Edinburgh, was resting at the royal family's estate Sandringham Tuesday, after a four-night stay in the hospital in which he underwent a successful coronary stent procedure.

The royal complained of chest pains Friday and was airlifted to Cambridge's Papworth, a medical facility specializing in heart surgery, where it was discovered he had a blocked coronary artery.

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Because he fell ill, the prince missed Sunday's royal church service and a Boxing Day shooting party Monday. Both Prince William and Prince Harry visited him while he was in hospital care.

Their loyal subjects turned out by the thousands to see Prince William and Kate, along with several other members of the British royal family, walk to and from church Christmas morning.

Kate was dazzling in an aubergine-colored coat and matching hat. She and William were joined by his father Prince Charles and stepmother Camilla, brother Prince Harry, and cousins Beatrice, Eugenie and Zara Phillips..Queen Elizabeth traveled by car.

After a traditional turkey lunch, several members of the family were planning to visit the family patriarch, 90-year-old Prince Philip, who remains in the hospital following emergency heart surgery on Friday.

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Prince William and Kate Middleton will be enjoying the traditional Royal Christmas celebration as planned despite his grandfather having a heart scare.

Prince Philip, 90, was airlifted 60 miles to a nearby hospital from the Sandringham estate where the Royal family have their festive celebrations. The large property is located about two hours from London.

The Queen, her son Prince Charles and his wife Camilla, all visited Prince Philip Saturday at Papworth Hospital where he had a coronary stent fitted to treat his blocked artery. William and Kate are not expected to visit him in the hospital.

“The Duke of Edinburgh had a good night and is in good spirits but he is eager to leave,” Buckingham Palace spokeswoman Ailsa Anderson said.

“Sunday’s church service is going ahead as planned and we don’t anticipate changes to the Royal Family’s Christmas celebrations.”

It's hoped, but is uncertain, that Philip will be able to join the family back at their estate in time to see Kate make her five outfits changes on Christmas Day.

“Kate will need a casual outfit for breakfast, a smart outfit and a hat for the morning church service, a dress for lunch, a cocktail dress for early evening drinks and a full-length dress for the evening meal,” Royal etiquette expert Jean Broke-Smith told Grazia magazine.

Katy Perry hosted last night's Saturday Night Live and starred in a riotous skit about the royal family. With the he-can-do-anything Bill Hader as Prince Philip and Fred Armisen reviving his cockney-version of Queen Elizabeth, Katy was there as Pippa Middleton.

The funniest moment was when the Pippa and the Queen compared their respective bums.

"I call my ass the IRA," said the Queen/Armisen. "When I walk into a pub, everybody's face explodes!"

Did guest host Katy Perry out-funny surprise guest star Alec Baldwin on the show?

You can watch the skit here on RadarOnline.com and leave your comments!

She’s got legs and she knows how to use them!

Gwyneth Paltrow slipped into a super short black sequin mini dress and showed off her amazing gams on stage and RadarOnline.com has all the photos from her fun night out.

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Prince William & Kate Middleton need look no further than their own TV sets tonight to get a primer on royal weddings. TLC is airing a special called William, Kate and 8 Royal Weddings, and you can see a preview right here on RadarOnline.com.

From Charles and Diana and Andrew and Fergie, right back to Elizabeth and Philip, the show takes a look at the glamour and spectacle of British royal weddings, and why people around the world are fascinated by them.

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William and Kate have only until April 29 to get all their plans in place, but they got a bit more practice at the whole wedding thing Saturday when they attended the nuptials of their friends Sarah Stourton and Harry Aubrey-Fletcher.

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Prince Harry and Princess Beatrice (daughter of Fergie and Andrew) were also there for the service at St. Andrew's Church in North Yorkshire. England.  Kate was dressed in a black velvet coat -- all the better to show off her dazzling sapphire engagement ring.

William, Kate and 8 Royal Weddings airs Sunday night on TLC.

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Although Prince William has said fiance Kate Middleton, or anyone else for that matter, is not trying to fill his mother Princess Diana's shoes, royal experts are drawing even more distinctions between the two most important women in the young royal's life. RadarOnline.com spoke to one royal expert whose comparisons show how Kate may surpass even the highest expectations of a princess set forth after Diana.

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"Kate and Diana are very different. They come from totally different backgrounds," Claudia Joseph, author of Kate: Kate Middleton: Princess in Waiting, told RadarOnline.com. "Diana hailed from an enormously privileged, aristocratic, old English family. Kate comes from a family that - as you can see from my book - descends from working class mining stock. In many ways, she had a much more modern upbringing."