I'm pretty sure I've mentioned these before but here we go...
Delta Goodrem - She did a surprise low-key fan meet-and-greet last year in Melbourne, announcing it on Facebook around 5pm, for about an hour later. Luckily it happened to be right near where I was living at the time! She was absolutely lovely, I've never been such a hot mess meeting someone in my life though. You can read the full messy recount here
Katy Perry - I won a competition to meet her around the time 'Teenage Dream' was released, it was quite the experience! She was super perky, but also super nice. She took the time to speak with everyone there, didn't seem rushed or bothered by anything. Some of you know the full version of the story, where she screams in face and then tells me show hopes I get laid
Kelly Clarkson - I got to meet her as part of a fan club meet-n-greet at Rod Laver Arena. She was wonderful, everything you'd expect she'd be. She was happy to pose for photos however people wanted and was happy to have a quick chat with everyone. She is actually tiny!
Paramore - Again, as part of a fan club meet-n-greet. Hayley, Taylor & Jeremy were good fun. This was right before Josh & Zac Farro left the band, those two were not into it at all, they looked like they'd rather be anywhere else. Hayley Williams is super tiny.
The Veronicas - Got to meet them as part of a concert meet-n-greet, they were also lovely. They are also absolutely tiny. We all got to go to a Q&A at the soundcheck, where they spoke quite openly and candidly to the group of us who were there about their troubles with the previous record label and the realities of working in the business.
I'm trying to remember any other minor encounters, like the time I stood next to Vanessa Amorosi at an MTV event or the time I saw Killing Heidi at the airport