Zomby Gaga is a 2016-introduced Monster High character and is a fiction-only character. She is based off of Lady Gaga and her revolution of monster pride, especially since she calls her fans "Little Monsters". She is a collaboration created with the Born This Way Foundation. She is the Monster High identity of Lady Gaga.
Zomby Gaga has a face resembling a skull with pink eyes and dark areas all over her face, and veins running down from the top of her head. She is blowing a bubblegum bubble out of her mouth. She has pastel pink and purple hair wrapped up in a side ponytail. She wears a black suit that looks like a male's tuxedo, complete with black bowtie, and wears a pair of black platform heels. She has tattoos on her hands of bones, and the words "LADY GAGA" spelled out on her knuckles. She comes with an alternate outfit, which consists of a red plaid dress with the Lady Gaga logo all over it, and black fishnet tights.
Zomby Gaga is a monster who wants all monsters to be themselves and be true to the world — and true to themselves. She is inspiring, creative, a talented artist and a truly devoted monster.
From the Monster High site: "Zomby Gaga is a ghoul who loves to celebrate bravery, kindness and acceptance! Monsters from all over the world are drawn to her welcoming personality, clawesome talent, and fangtastic sense of style, which changes with her mood. Her fave outfit is a sleek black tux that makes her feel elegant and sophisticated while still rocking her tattoos and scary-cool accessories; however, she believes every monster should wear what makes them feel most like themselves. Zomby Gaga is on a mission to spread love throughout the world, and invites every monster to join her." 
- Zomby Gaga's appearance is based on Lady Gaga's Born This Way music video and Rick Genest, a artist, actor, and fashion model who is also known as Zombie Boy.