 " What You Waiting For ? " was released as the album 's lead single ; according to Stefani , as an " explanation for doing the record " . The song was well received by critics , and was frequently cited as a highlight of the album . The single was commercially successful , topping the chart in Australia and reaching the top 10 in several countries . It was certified gold in the United States , and was nominated for Best Female Pop Vocal Performance at the 47th Grammy Awards . The song has been remixed a number of times , and was covered by the indie rock band Franz Ferdinand and singer Marina and the Diamonds . 
