 Akon 's presence as a featured artist on the track received negative reviews . Quentin B. Huff of PopMatters found that Akon contributed too few vocals to the song and that they were wasted . Rolling Stone reviewer Rob Sheffield agreed , viewing the song as a fumbled attempt to capitalize on the success of Akon 's " Smack That " featuring Eminem . The Observer 's Paul Flynn was displeased with his presence in lieu of higher profile hip hop artists such as Dr. Dre and André 3000 on Stefani 's previous album Love . Angel . Music . Baby . ( 2004 ) . He added that the song sounded like a " weirdly flat " version of Madonna 's 1986 single " True Blue " . Charles Merwin of Stylus Magazine described his vocals as " yelping " . 
