Hollaback Girl
... that Gwen Stefani's song "Hollaback Girl" was the first single ever to sell more digital downloads than CDs?
... that <a href="./Gwen_Stefani" id="mwCR8" rel="mw:WikiLink" title="Gwen Stefani">Gwen Stefani</a>'s song "<b id="mwCSA"><a href="./Hollaback_Girl" id="mwCSE" rel="mw:WikiLink" title="Hollaback Girl">Hollaback Girl</a></b>" was the first single ever to sell more digital downloads than CDs?