21 (Adele album) and vocal problems led to numerous alterations to the tour itinerary. The cancellation of the North American leg of the tour was due to a vocal haemorrhage on her vocal cords. The singer underwent corrective vocal surgery in November 2011 and cancelled all public appearances until February 2012. Adele performed "Rolling in the Deep" at the 2011 ECHO Awards, 2012 Grammy Awards and 2012 BRIT Awards ceremonies. "21" yielded five singles in total, including four worldwide releases. The lead single "Rolling in the Deep" was released in November 2010, and peaked the charts in the Netherlands, Germany, Belgium, Italy, and
Post Mortem (album) entitled "Honest Eyes", which was later released as a stand-alone digital only single.<br> The second official single from the album, "Walking Dead Man", was released digitally on May 23, 2011. A music video soon followed on June 14, 2011. The third single from the album, entitled "That Fire" was released on June 21, 2011 and a music video for the song followed on June 23, 2011. The band has also released Acoustic versions of the songs "That Fire", and "Fight Til The Bitter End" via their YouTube account. During its first week on sale, "Post Mortem" sold about 5,800 copies,