Livin' On A Prayer: Prince William, Taylor Swift, Jon Bon Jovi

Britain's Prince William took onlookers by surprise when he jumped on stage with country singer Taylor Swift and American musician Jon Bon Jovi at the Centrepoint Gala Dinner at Kensington Palace in London on Tuesday, November 26. William was invited onto stage by Bon Jovi and insisted that Taylor come too.

The heir to the British throne joined in on an impromptu rendition of rock royalty Bon Jovi's hit Livin' On A Prayer.

A more sedate moment from the evening.

Taylor Swift looked stunning in a white and gold Reem Acra gown while Prince William looked dapper in a formal black suit.

Taylor poses for a picture with Jon Bon Jovi.

Coming up: Stars dazzle at the American Music Awards

A host of celebrities walked the red carpet at the American Music Awards held in Los Angeles on Sunday, November 24.

Taylor Swift, who won the Artist of the Year award, stole the show in a strapless gold Julien Macdonald mini dress.

Katy Perry looked beautiful in a black strapless Oscar de la Renta gown with polka dots and flowers.

In contrast to her shocking VMA look, Miley Cyrus walked the red carpet in an all-white suit - with nothing underneath.

Christina Aguilera strutted along the red carpet in a low-cut Maria Lucia Hohan dress.

Rihanna, who won the Icon award, dazzled in a black bra top and see-through skirt.

Lady Gaga, who arrived at the venue in a white horse, looked a bit out of tune in her lavender Versace gown.

Reality television stars Kendall and Kylie Jenner made heads turn on the red carpet. Kendall looked stunning in a white Keepsake top and mini skirt while Kylie looked smart in a her white Maiyet top worn with black Giambatista Valli pants. But what caught our attention were those lovely bangs which made Kylie look simply gorgeous.

Nicole Richie was a vision in a white sleeveless Emilio Pucci gown.

Zoe Saldana's Roland Mouret dress did not go down too well with us.

Singer Jennifer Hudson looked smashing in a orange Christian Dior gown.

Kelly Osbourne had a fashion disaster in an ill-fitting Rami Al Ali gown.

Heidi Klum looked pretty in her black Marchesa dress.

Lady in Red: Ariana Grande sparkled in a red sequined Dolce & Gabbana gown.

Alicia Silverstone hit the red carpet in a short black and gold Nicole Miller outfit.

Ke$ha stunned in a one shoulder Michael Costello gown.

Emma Roberts' silver Lanvin gown failed to impress us.

Justin Timberlake, who won the award for favorite male artist - pop/rock, was dapper in a blue tuxedo with a black waistcoat.

Marc Anthony was casually dressed in a black T-Shirt worn with a pair of blue jeans and a cheque shirt.

Jeremy Renner was dressed to kill in a white shirt worn with a black jacket and matching trousers.

Akon rocked the red carpet in a black leather T-shirt and trousers.