Wacken Open Air, Rock am Ring, Tuska Open Air Festival. The last festival of the tour was Sziget Festival on August 14. On September 6, 2010, the band announced that Khan had fallen seriously ill during rehearsals for the upcoming North American tour, just a few days before its scheduled start, and had returned to Norway. While it was initially reported that the band would continue the tour with the Norwegian vocalist Michael Eriksen of Circus Maximus in Khan's place, the band later announced that it would postpone the tour with Khan, though one show was performed with Eriksen at the ProgPower USA XI festival in Atlanta, Georgia, on September 10, 2010. However, on December 16, due to Khan's lingering illness, it was announced that Fabio Lione of Rhapsody of Fire would replace Khan for the remaining and rescheduled dates on the Pandemonium over Latin America, Europe and North America tours in 2011, and later the 70,000 Tons of Metal Cruise in 2012. Other guest singers appeared on selected shows, such as Simone Simons singing The Haunting and Don't You Cry, Tommy Karevik singing Center of the Universe, EdenEcho and The Human Stain, Shagrath as Mephisto on March of Mephisto and Memento Mori, Alissa White-Gluz also as Mephisto on March of Mephisto and Atle Pettersen on Karma. On April 15, 2011, the band released Poetry for the Poisoned & Live from Wacken – Limited Tour Edition, containing the audio from Khan's last recorded show with the band. New singer and Silverthorn (2012–2014) Following a period of uncertainty, Khan and Kamelot released separate statements on April 21 and 22 respectively, announcing Khan's departure from the band. According to Youngblood, the band was already searching for a new singer, with the deadline for submissions at the end of January. On June 22, Kamelot introduced Seventh Wonder's Tommy Karevik as their new official vocalist. Karevik had previously appeared as one of the guest singers on the 2011 Pandemonium World Tour. Their first show with Karevik was on July 12, 2012 at Masters of Rock. Kamelot returned to the German label SPV GmbH to release their tenth record (their first with Karevik), which was unveiled as Silverthorn in July, along with a release date of October 26, 2012. A music video was released for the first single from Silverthorn, "Sacrimony (Angel Of Afterlife)". Silverthorn was greeted with positive reviews and the band once again