I bet you never thought you'd see this! Prince William and Taylor Swift joined Bon Jovi on-stage at the Winter Whites Centrepoint Gala on Nov. 26 for a rendition of the rocker's hit "Livin' on a Prayer."

The trio performed the impromptu song for the gala's 600 invited guests, creating a moment that will certainly go down in Royals history. Swift also performed solo at the gala which raised money for the homeless youth organization Centrepoint, for which William is a patron.

Though held at the Prince's Kensington Palace residence, wife Kate stayed in her wing with 4-month-old son George. It looks like she missed out on quite a party! Check out video from the performance below:

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