Imagine Dragons have joined an elite club after scoring a diamond certificate from the Recording Industry Association of America for sales of their hit Radioactive. The track has become the longest-running song in the history of the Billboard charts, and now it joins Lady Gaga's Bad Romance, Justin Bieber's Baby and Eminem's Love the Way You Lie and Not Afraid as a digital diamond success with sales of over 7.7 million. Elton John's Candle in the Wind/The Way You Look Tonight is the only physical single to accomplish that feat, according to Radioactive spent 87 weeks on Billboard's Hot 100 chart and earned Imagine Dragons a Grammy Award.