The choreographer will resume her judging role alongside Nigel Lythgoe on tonight's season opener, which features auditions from Atlanta and the Bay Area.
"Me and Nigel were looking at each other because this typically does not happen to us. Normally, we get that kind of reaction in New York and we didn't have that this year, and then at Atlanta there were so many amazing dancers," she told reporters on a recent conference call.
"It was, like, just an overwhelming overkill of excitement, because we were just, like, left and right, handing tickets out to Las Vegas and looking at each other almost giddy-like by the end of the day. That was so exciting. It didn't even seem like 15 hours just went by."
So You Think You Can Dance's format this season will feature a Top 20, with the All-Stars being introduced at the Top 10 stage.
"Once we pick the Top 10 we're going to match the All-Star to fit that person better so height-wise, look-wise and dance-wise," she said. "So it's going to be a little more tailor made this season. So I think it's going to provide extra exciting dancing towards the end."
There will also be a third "revolving" judging chair this season, following the departure of Adam Shankman to focus on Rock of Ages, which will be filled by different guests.
Murphy, who said that she "missed out on people having the magical moment" the most last season, also told reporters that her favourite part of the So You Think You Can Dance experience is watching the contestants grow each week.
"We have invested a lot this season with hip-hop dancers and with street dancers that have never been trained, so it's in the hopes that they're going to grow as they move along the season. Now, maybe me and Nigel are wrong and we may have a lot of train wrecks, but we have a lot of confidence and these kids have so much heart and soul," she said.
"This season, we're going to have a much wider variety of dancers and I think it's going to give the show a lot more flavour."
As for what advice the choreographer would give the season eight contestants, she told reporters that she would advise them to focus on maintaining their health and wellbeing.
"I hope they do take it seriously because you know they get so fired up," she said. "They're away from home, most of them, for the very first time in their life, and they might get carried away in Los Angeles. But with what their bodies are going to go through, they need their sleep. I know they've got a lot of press to do every day and a lot of things, in costumes and this and that and make-up, but they need their sleep."
So You Think You Can Dance premieres tonight at 8/7c on Fox and airs Wednesdays and Thursdays throughout the summer.
More So You Think You Can Dance:
> Mary Murphy: SYTYCD talent getting better
> So You Think You Can Dance's Nigel Lythgoe: Q&A