TODAY | November 27, 2013
now to the unexpected musical performance from prince william that's making headlines around the world. nbc's keir simmons is in london. keir, good morning to you.
>> reporter: good morning. this was a lavish party held at william and kate 's home kensington palace but kate wasn't there. sometimes the prince wants the focus on the charity rather than kate . but when kate 's away, william was out to play. yes, that really is taylor swift , john bon jovi and the artist currently known as prince william living on a prayer
>> reporter: a musical moment taylor was plotting all night. prince harry was absent too embarking on a trek to the south pole . both princes going all out for their charities.
>> my brother is quite jealous that i managed to get away from screaming charles.
>> reporter: no, william is back home hanging out with taylor swift .
>> he's funny and cool.
>> reporter: please don't make me sing he begged her.
>> by which he meant get me on stage.
>> john bon jovi liked the idea.
>> he is fond of singing living on a prayer . we'll see if we get a duet out of him.
>> reporter: after performances at the winter wonderland gala ball raising money for a homeless charity, taylor swift pulled a reluctant duke of cambridge from the audience. the prince composed himself, found his rhythm and got at least halfway there. there you are. prince william more often heard singing god save the queen . he did really well with taylor swift . they have a long conversation. at one point taylor swift was asked a question by a british reporter and she leaned in and said i love your accent but i don't have a clue what you're saying.
>> i'm sorry, keir, did you say something? your accent is adorable but i didn't catch that.
>> reporter: tomato, tomato.
>> what do you think?
>> good back up. look for their tour this spring. should be great. he had a lot of guts to do that.