"If you are in a mood to party like it's 1929, then the anachronistically dapper Max Raabe can take you there with his revival of Weimar-era cabaret and tin pan alley classics. While the lyrics of tunes like "You are my Greta Garbo" betray a sense of irony that is surprisingly in tune with our times, Raabe's dedication to the sound and spirit of these old songs is fully in earnest." -- German Missions in the US
Here's a little sampler of their tunes from their website.
Also, search for Max Raabe on Youtube for another set of their gorgeous performances.