"Toxic" was released on January 13, 2004 as the second single from Britney's fourth studio album In The Zone. It's a dance-pop song with electropop and bhangra music influences and features varied instrumentation, such as drums, synthezisers and surf guitar. It's accompanied by high-pitched Bollywood strings and breathy vocals. The lyrics draw an extended metaphor of a lover as a dangerous yet addictive drug. "Toxic" topped the hitlists in United Kingdom, Australia, Canada, Sweden, Norway, Ireland and Portugal. The song earned Spears her first Grammy at the 2005 ceremony in the category of Best Dance Recording.