Singer and comedian Al Jolson's customised 1932 Packard Twin Six 906 sedan is among the stars of Gooding & Company's January 20-21 Scottsdale auction.
The car was delivered new in 1932.
Al Jolson was doing well for himself in the 1930s, as this Packard attests
It's hard to overstate just how big a performer Jolson (1886-1950) was in America during that time.
He was billed as "The World's Greatest Entertainer" and performed to sold out crowds in the nation's biggest venues, as well as appearing in a string of hugely successful movies.
Famously he performed in blackface, a hangover from the vaudeville days of the 1800s that only began to die out in the 1950s.
This car is a testament to Jolson's success.
At the time Packard was the ultimate luxury American car manufacturer.
In addition to its unparalleled technical specs (like the 12 cylinder twin six engine), the model also features limited edition coachwork by renowned designer Raymond Dietrich.
Jolson put the car in storage in 1940, before selling it on to Packard enthusiast Harold Crosby.
The estimate is not available, but it last sold at auction for $1.1m in 2011. That's a figure it's likely to substantially exceed this time around, especially since achieving a gold medal spot at Pebble Beach in 2012.
Other lots offered in the auction include a 1967 Ferrari 275 GTB/4, valued at $3.4m.