 Jon Pareles of Rolling Stone said , " [ Spears 's ] voice is so processed , its physicality almost disappears . [ ... ] In the Zone offers strip @-@ club , 1 @-@ 900 sex , accommodating and hollow . Beyond the glittering beats , Spears sounds about as intimate as a blowup doll . " Sal Cinquemani of Slant Magazine stated , " Britney 's fourth album , In The Zone , finds the pop tart coming of age with a bold mix of hip @-@ hop and dance music , wiping clean the last traces of her bubblegum @-@ pop past . [ ... ] For the most part , In The Zone is a big , fat , thumping love letter to the dancefloor , which makes Madonna 's involvement [ ... ] even more appropriate . " Dorian Lynskey of The Guardian commented , " Unlike previous Britney albums , In the Zone has no filler and no shoddy cover versions , just 57 varieties of blue @-@ chip hit @-@ factory pop . There is southern hip @-@ hop , deep house , Neptunes @-@ style R & B , the ubiquitous Diwali beat and , most importantly , oodles of Madonna . " Jason King of Vibe deemed it as " A supremely confident dance record that also illustrates Spears 's development as a songwriter . " " Toxic " won Spears her only Grammy Award for Best Dance Recording in 2005 . 
