A morning mix of headlines . . .

Prince William canceled his plans to attend a military event Sunday because Kate Middleton remains ill. The Duchess of Cambridge’s hyperemesis gravidarum, an acute form of nausea caused by her pregnancy, continued over the weekend, prompting William to also postpone his plans to return to work this week at a Royal Air Force base in Wales. (The Daily Beast)

Jenni Rivera earlier this year. (Reed Saxon/AP)

At the weekend box office, “Skyfall” narrowly defeated “Rise of the Guardians” to again become the No. 1 movie in North America. As for that Gerard Butler movie that we thought no one would see? Almost no one saw it. It debuted in sixth place. (AP)

Peter Jackson says the decision to turn “The Hobbit” into three movies was really inspired by J.R.R. Tolkien and his ideas. Because it’s widely known that Tolkien had many thoughts about how to charge people three times to see a story they easily could have seen by paying for one movie ticket. (MTV)

Remember when Miley Cyrus did a stripper pole dance at the Teen Choice Awards back in 2009? Well, she has matured since then. Now she just performs next to half-naked strippers dancing on poles. Progress. (Us Weekly)

After apologizing following media reports that he expressed anti-American sentiments at a 2004 protest concert, Psy performed for President Obama at Sunday’s Christmas in Washington concert. As a result, we all now have the perfect image to put on our holiday cards. (The Washington Post)

(Kevin Mazur/WireImage)

Because search engine algorithms have a twisted sense of humor, doing a Google Image search for “dying grandparent”results in many photos of Christina Aguilera. Please don’t ask why anyone would search for images of dying grandparent, just enjoy the Internet comedy. (Buzzfeed)

What did Post critics choose as the best films, TV shows and pop albums of 2012? Find out here, here and here (respectively).