Back for More (with Anitta) Produced by Ryan Tedder, Slow Rabbit, Tyler Spry (Ryan Tedder, Tyler Spry, Slow Rabbit, Zegon, Laudz, Rios, Anitta) Co-produced by Tropkillaz Keyboard - Tyler Spry, Tropkillaz Synthesizer- Tyler Spry Guitars - Tyler Spry, Simon Oscroft Bass - Ryan Tedder, Tropkillaz Percussions - Ryan Tedder, Tyler Spry, Joe Henderson, Tropkillaz String Arrangement - Collins, Ryan Tedder String Contraction - Paul Nelson Violins - David Davidson, David Angell Viola - Monisa Angell Cello - Paul Nelson Whistle - Tyler Spry Beatboxing Vocals - Tropkillaz Programming - Tyler Spry, Ryan Tedder, Slow Rabbit, Collins, Tropkillaz Background Vocals - Ryan Tedder, Anitta Vocal Arrangement - Slow Rabbit, Stephen Kirk, Ryan Tedder Additional Vocal Arrangement - Joe Henderson Recording Engineers - Slow Rabbit @ Carrot Express, Seoul, South Korea Ryan Tedder @ Andara Studios, Phuket, Thailand Richard Rich III @ Andara Studios, Phuket, Thailand ...