String Ensemble,String Trio Cello,Violin - Level 4 - Digital Download SKU: A0.884252 By Britney Spears. By Cathy Dennis, Christian Karlsson, Henrik Jonback, and Pontus Winnberg. Arranged by Halley Feaster. Film/TV. Score and parts. 10 pages. Halley Feaster #6451111. Published by Halley Feaster (A0.884252). This is a String Trio (Violin 1, Violin 2, Cello) arrangement of Britney Spears's TOXIC!Super fun and accurate, you'll have your friends dancing like they're in the club.  Yes, to a string trio.