From unworthy back to worthy, in just one day - Las Vegas Sun
The Celtic rock group Killian's Angels produced some music that was used in Grand Theft Auto IV, but was the only contributor not to have a Wikipedia entry. Someone decided to correct this oversight by creating a Wikipedia entry, but it was deleted because, according to one online editor, the band lacked notability (that is, no references in popular media). This prompted a newspaper article about the band's plight, which made the band notable, earning it a Wikipedia entry about how it didn't have a Wikipedia entry. Apparently this is not the first time this has happened.