A never-before-seen video of Lady Gaga's performance of the Billy Strayhorn classic "Lush Life" has surfaced online and it's absolutely stunning. The performance was professionally recorded during Gaga and Tony Bennett's concert at the Grand Place of Brussels, Belgium, held to promote their joint album Cheek to Cheek back in 2014. It is rumored that the footage was originally planned to be a part of a documentary film about the album, but the project was later scrapped.

Watch Gaga perform "Lush Life" in Brussels below.