Swedish House Mafia and Knife Party (a side project of Pendulum’s Rob Swire and Gareth McGrillen), both popular electronic music groups, collaborated together on a track called "Antidote", which was released on December, 16, 2011. The track quickly shot to #1 on the Beatport charts and the top 15 on Billboard’s dance chart, also reaching #2 in the U.K. midweek charts as well. The video for “Antidote” has been viewed over 3.5 million times and found itsself in rotation at MTV, MTV HITS, mtvU, and MTV Clubland.