GEORGE MICHAEL: Vaults Open for Soundtrack

George Michael's family is sharing the first bit of unreleased material from the late singer's private vault -- an upbeat, funky song called "This Is How (We Want You to Get High)."

The tune, which plays over the end credits of the just-released rom-com Last Christmas, was completed at George's final recording session in 2015. Michael actually started work on it in 2012, but in typical perfectionist fashion, he tweaked it over the course of three years.

Last Christmas hits theaters on Friday.