A 1964 Porsche 356c Cabriolet that once belonged to Janis Joplin has sold for $1.76 million at auction.

The car featured a unique paint job done by Joplin's roadie Dave Richards, who adorned it with butterflies and psychedelic imagery.

"Janis Joplin's 356C is without question one of the most important Porsches of all time," said a Sotheby's rep of the auto, which went on the block last week at the house's Driven by Disruption vintage car auction.

"It's a fantastic automobile that transcends art, pop culture and social movements, and is as groundbreaking and stunning as the renowned singer was herself."

Joplin purchased the car in 1968 and drove it frequently up to her death in 1970.

Her family sold it after two decades of sitting in exhibit at the Rock and Roll Hall of Fame in Cleveland, Ohio.