Lady Gaga’s sushi and champagne diet!

Is this the secret behind Lady Gaga’s banging body?

According to Life & Style magazine, the quirky popstar is on a diet of sushi and champagne!

“As Lady Gaga counts down to the Oscars on Feb. 28, she’s making sure she’ll look her best — by sticking to a diet of only sushi and champagne,” says a close pal.

“She calls it her ‘good luck diet.'”

Lady Gaga. Photo: Getty

We’re told the 29-year-old singer - who has admitted to suffering from body issues such as bulimia and anorexia in the past - finds this way of slimming better than other eating plans.

“At first she thought the all-fish and bubbly diet just made her feel healthier and more clear-headed,” adds the insider.

“But now she’s turned it into a weird good-luck ritual to help her win the Oscar. When Gaga sets her mind to something, there’s no changing it!”