The Private Practice star strutted onto Jay Leno's late night show wearing a little black dress covered with raw fish, and shaded her eyes with Gaga-inspired glasses made from Tamago - a Japanese-style omelet.
She completed the edible ensemble with a ring made from a sushi roll and prawns strapped to her Louis Vuitton stilettos, telling the comedian, "This is a shout out - an homage - to Lady Gaga."
The actress explained she designed the get-up after accidentally upsetting Gaga fans with an online quip about the strips of red meat the singer donned as a dress at Sunday night's (12Sep10) MTV Video Music Awards.
Walsh said: "I was on a plane during the VMAs and one of my Twitter fans said, 'What do you think of Lady Gaga's meat dress?' ...The first thought I had was like a nice plate of prosciutto with melon, thinking that was kind of witty. Oh no, no.
"It set off the little monsters (Gaga fans). It opened up a whole can of whoop a**. They were mad. It was interesting because the tweets came fast and furiously. I was called a D-level actress."
But Walsh insists she didn't mean to upset the little monsters: "I'm a huge fan of Lady Gaga."