N.E.R.D.'s fourth album, Nothing finally materializes afer several delays, including the reported scrapping of 27 songs. Another trip-up was the brief membership of Canadian native Rhea, a vocalist added to the group's lineup of Pharrell, Chad Hugo, and Shea, only to be let go after within a few months. Nothing's boisterous lead single "Hot-N-Fun," features another Canadian, Nelly Furtado.