The 'You & I' singer released the image - which shows her standing in a mystical castle wearing a keyboard outfit - on Twitter at around midnight on Wednesday (February 8).
The unveiled image precedes confirmation of dates for the 2012-2013 tour, which GaGa said would be arriving at approximately 7pm GMT (11am PST) on Wednesday.
Teasing the announcement, she wrote: "You know, I work on so many art projects all the time when I see you guys online I feel like were (sic) all doing homework together.
"Just finished my homework due tomorrow at 11. Feel like turning it in early. ;)."
GaGa has also shown fans a first look sketch of the 'Born This Way Ball' stage, which includes a 'Monster Pit' for "the fans who have arrived first, waited all night [and] dressed to 'Ball'."
Every night, several concert-goers from this area will be selected to come backstage and meet the singer herself.
GaGa's jaunt, described by producer Fernando Garibay as an "exaggerated" version of her 'Monster Ball' tour, is believed to span 450 dates over two years.
Watch Lady GaGa perform 'Born This Way' on Saturday Night Live below: