The band has released the following statement:
"It is with great regret that we have to inform you that Andy (screaming vocals) will not be part of our debut show in the US, at ProgPower in Atlanta, GA. Andy has recently become a father, and needs the time to dedicate himself to his family - but don't worry, he will be back in the shows that follows!
To fill his shoes we are happy to say that Nightrage vocalist Antony Hämäläinen will temporarily fill Andy's huge screamer-shoes! Antony has for years shared the stage with Olof, and is also a long-time friend of the band, which ensures as seamless of a replacement as possible. See you all American Amaranthe fans soon!"

Running order for the festival is below:
Friday, September 14th:
EPICA - 11:45PM - Close
REDEMPTION - 10PM - 11:15PM
PRIMORDIAL - 8:30PM - 9:30PM
SERENITY - 7PM - 8PM
AMARANTHE – 5:30PM - 6:30PM
KINGCROW - 4PM - 5PM
SINBREED - 2:30PM - 3:30PM
Saturday, September 15th:
SYMPHONY X - 11:45PM - Close
PRETTY MAIDS - 10PM - 11:15PM
MAYAN (with special guests) - 8:30PM - 9:30PM
MYSTIC PROPHECY - 7PM - 8PM
SOLUTION .45 - 5:30PM - 6;30PM
LANFEAR - 4PM - 5PM
BEYOND THE BRIDGE - 2:30PM - 3:30PM
Gold Badge doors will open at 1:30PM, Regular doors: 2PM
More on ProgPower USA XIII at Progpowerusa.com.