Dark Horse is the sixth studio album by the Canadian rock  band Nickelback, released on November 17, 2008 in Europe and a day later elsewhere. The follow-up to their multi-platinum selling All the Right Reasons (2005), it was co-produced by the band and Grammy Award-winning producer and songwriter Robert John "Mutt" Lange, famous for working with such acts as Foreigner, AC/DC, Bryan Adams, Def Leppard and Shania Twain. More than a year after its release, the album hasn't left the Top 100 on the Billboard 200. So far, it has stayed there for 79 consecutive weeks, peaking at #39 on the latest issue, on the week of May 22, 2010.