On August 16, 2011, RCA announced that they would merge Clarkson's two websites, KellyOfficial.com (Sony Music site) and KellyClarkson.com (Official Fan Club site), in favor of KellyClarkson.com. On August 17, 2011, RCA released press statements for the release "Mr. Know It All", which was released on August 30, 2011, and of Stronger, which was set to be released on October 25, 2011. On September 7, 2011, RCA released the album cover and moved up the release date to October 24, 2011 due to overwhelming demand. On August 30, 2011, Clarkson hosted a special live webcast on her website to premiere "Mr. Know It All". Clarkson began promoting the song worldwide for the first time at the Stars for Free music festival in Berlin, Germany on September 10, 2011. She then performed it on The Tonight Show with Jay Leno on September 20, 2011, at the iHeartRadio Music Festival in Las Vegas, Nevada on September 23, 2011, on the Australian television series The X Factor, and at the 2011 NRL Grand Final at the ANZ Stadium in Sydney on October 2, 2011 accompanied by three hundred dancers, which marked her first appearance at the event in 8 years since the 2003 NRL Grand Final. On October 5, 2011, Clarkson previewed the final version of "Stronger (What Doesn't Kill You)" and "You Love Me" on her website to positive reviews from music critics. Billboard commented: "The track is a sonic departure from first single 'Mr. Know It All' and may give an indication of the range of material on Stronger." Clarkson then promoted the album at the thirteenth season of Dancing with the Stars on October 18, 2011. Clarkson also performed "Mr Know It All" at the eighth series of British television series The X Factor on October 23, 2011, at the 2011 American Music Awards on November 20, 2011, and at the German television series X Factor on November 1, 2011. Clarkson then promoted Stronger on The Today Show on October 25 and 27, 2011, The View on October 26, 2011, and Late Night with Jimmy Fallon on October 28, 2011. On October 12, 2011, VH1 announced that Clarkson would film VH1 Unplugged: Kelly Clarkson, featuring songs from Stronger, on October 27, 2011, which would then be broadcast the following month on November 17 and 18, 2011. Clarkson also appeared at the MTV O Music Awards on October 31, 2011. Clarkson