“Toxic” is a recorded song by American singer Britney Spears. It was written and produced by Christian Karlsson and Pontus Winnberg (Bloodshy & Avant). A dance-pop song with electropop influences, “Toxic” features varied instrumentation, such as drums, synthesizers and surf guitar. It is accompanied by high-pitched Bollywood strings and breathy vocals.

The String Quartet Arrangement sounds very effective, fresh and unified, as compared to manny sugary pop string arrangements out there.