Rock band The Knack has sued several online music distributors, including Yahoo, Amazon, and Apple, for distributing copies of Run DMC’s song “It’s Tricky,” which contains an unauthorized sample of The Knack’s “My Sharona.” In a 49-page complaint filed last month, The Knack’s front man Doug Fieger and lead guitarist Berton Averre claim that Run DMC illegally copied parts of their 1978 hit “My Sharona” into Run DMC’s 1986 hit “It’s Tricky.” Although the statute of limitations for copyright infringement is three years, Fieger and Averre claim they had not heard Run DMC’s song until August 2005.