The Hordern Pavillion in Sydney got a huge dose of star power and green goo at the inaugural Slimefest event on Saturday. A mix of musicians and TV personalities subjected themselves to being slimed in front of a crowd of more than 3,000 excited fans, including Charlotte Dawson in her first public appearance since being hospitalised after vicious social media attacks. The issue of trolling in recent weeks even caused the celebrities to band together for a new 'Dare to be Square' campaign, which calls for more positivity on social media. Energetic performances came from the likes of Reece Mastin, Guy Sebastian, Johnny Ruffo, Jessica Mauboy and Justice Crew, while other names who got covered in slime included Rachael Finch, newlywed Brian McFadden, and Commando and Tiffiny Hall from The Biggest Loser. The event also set a new Guinness World Record for the most people slimed simultaneously over the two music shows.