Now in its fifth season, So You Think You Can Dance is hotter than ever! Rachael asks judges Nigel Lythgoe and Mary Murphy if the competition gets tougher every year. "There's just more people getting into dance," Mary explains. "Especially because they believe in themselves; they're full of heart and soul. I mean, you can do it."

"Over the five years it's developed so much," Nigel adds. "Before, they were sort of separate -- this is the ballerina, this is the hip-hop dancer, and the hip-hop dancer normally had a chip on his shoulder, 'We don't need to do that, we can do this and spin on our heads.' Now everybody wants to learn everything. So it's all developing and merging together and it's really exciting."

Rachael wanted to get a glimpse at what auditions were like at So You Think You Can Dance, so she sent Summer Sanders, former Olympic swimmer and mother of two, to strut her stuff for the judges. A huge fan of the dance show, Summer tells Rachael that despite having won gold medals, her audition for the judges was nerve-wracking. "I was absolutely 100 percent terrified!" she admits. "I'm a pretty good dancer at a wedding, but then I walked out and I was in front of this whole stage of people! I can't even remember what I did!"

"Well," Rachael tells her, "brace yourself, because you're going to see it now, cookie!" Watch the video above to see how she did -- and what Nigel and Mary had to say about her performance!

So, think you can dance? Check out fox.com/dance for information about auditions for Season 6!

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So You Think You Can Dance