Answer: Probably all of the Dancing With the Stars pros! But specifically Kym Johnson.

Kym expressed the nerves all the Season 15 dancers must be feeling right now when she told Celebuzz, “I’m more nervous this time around than for any other season."

At least Kym has a familiar All-Stars partner — her Season 4 runner-up, Joey Fatone. However, Kym tweeted that she and Joey are dancing first tonight. Gulp! Imagine having to set the tone on an All-Stars season, when you know everyone will be amazing.

The judges will be using Joey & Kym’s routine as a benchmark for the rest of the dances. At least the couples performing after them will have an idea of how judging will go this time around. It's likely to be much tougher, since Carrie Ann Inaba has warned that the judges will have much higher standards this season. Poor Joey & Kym will be the guinea pigs.

Plus, sometimes the first dancers of the night end up going home first, perhaps because they get lost in the shuffle of the rest of the night. And that's Kym's biggest fear.

"You know, I just don’t want to be the first ones to go,” she told Celebuzz. “That’ll be hard because someone is leaving the first week. So that sucks. It’s quite cruel.”

Once again, that has to be exactly what the other pros and celebs are thinking too. 13 couples will enter the arena tonight and only 12 will emerge to dance again next week. It makes us nervous just thinking about it — and we’re not the ones performing live in front of 20 million people!

Dancing With the Stars Season 15: All-Stars will premiere on Monday, September 24 at 8 p.m. ET/PT on ABC. Check out the full All-Stars cast list here.

Sources: Celebuzz, Twitter

Gina Carbone is a contributing writer at Wetpaint Entertainment. Follow her on Twitter @ginacarbone.

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