Roll up your sleeves and show off your tats: Mario Barth’s Biggest Tattoo Show on Earth kicks off at the Mirage today. More than 40,000 people are expected to attend the tattoo mogul’s skin and body modification convention, which runs through October 2 and gives ink fans the chance to be tattooed by the industry’s top artists from around the world. Convention-goers can also participate in seminars and one-on-one sessions presented by tattoo artists, including Barth, owner of King Ink at the Mirage. Topics include business, shop design and body piercing.

But what you’ll really see walking the floor is the tattoo world in action. From Samoan masters to Japanese traditionalists and American legends, an array of industry icons and ink celebrities will be present, giving tattoos, meeting new clients and educating the attendees about their methods. Notable artists include Mario Barth, Stanley Moskowitz and Peter Sulu Ape.

Recording artist Yelawolf performs at 10 p.m. at King Ink, and Porcelain Black will perform her hit “This Is What Rock and Roll Looks Like,” on Saturday at 10 p.m. Rock band Black Tide will perform songs off their new album Post Mortem at 10 p.m. on Sunday. The heavily tatted Evan Seinfeld will serve as the celebrity emcee during the three-day expo.