WDR 2: One Hit Wonder is a compilation album series from the German radio station WDR 2, featuring "one-hit wonder" songs, with the specific album "WDR 2 - One Hit Wonder!" being a double CD released in 2010. These compilation albums group together popular songs that were major hits for artists who are primarily known for that one song, a definition supported by sources like the Wikipedia entry on one-hit wonders and American Songwriter.