Lady Gaga is no stranger to unforgettable performances. And on Monday (September 9) she added one more to her long list of stage spectacles. She took the stage on "Good Morning America" to put a very old Hollywood spin on her latest single, "Applause," by paying homage to the 1939 Judy Garland classic, "The Wizard of Oz."

Wearing a blue-and-white gingham dress like Dorothy's, she first performed "Over the Rainbow" with her real dog, Fozzi, serving as a Toto stand-in. She sang the track to the Scarecrow, the Cowardly Lion and the Tin Man (who would later serve as her back-up dancers) before declaring, "Well, I live for your applause. Shall we make our way to Oz?"

The theatrical performance included audience members wearing poppy hats and, of course, a yellow brick road. At one point she changed out of her Dorothy attire to rock a Glinda the Good Witch dress and then stripped down to her black "Applause" leotard to defeat the Wicked Witch of the West. It was all capped off when she re-emerged in her Dorothy gingham with big hair and a bow.

Gaga was back after her eye-catching performance of "Applause" to chat about why she wanted to pay homage to the iconic flick, which is celebrating its 75th anniversary. "I think it really is an explanation, in a way, for my entire career so far, even with the VMAs performance and then the transformations that were happening today," she said. "It's like my way of saying all of these outfits and all of these wigs that I have been changing in all of these years, this is my way of assimilating and this is my way of surviving. This is my way of getting to Oz, of getting to Oz to have all my dreams come true."

Gaga is about to release her third album, ARTPOP. She teased several new tracks when she took the stage at the iTunes Festival in the U.K.; ARTPOP will hit retailers on November 11.

"I think every person in their life goes through so many different things. I was going through a hard time with Born This Way. I was kind of insecure," she explained. "I became a star really quickly and I didn't really have time to really put my feet in the ground and have a sense of myself through it all 'cause it's like a machine and you just keep going.

"There was a lot of me putting things on I think to hide that sadness and the record reflected that," she continued. "I'm feeling so positive and healed in a lot of ways and I feel really overjoyed and full with love. I'm obsessed with making things colorful and happy, and I think it's because I'm in a happy place. So when I'm in a happy place the music is."