The following are confirmed producers that No Doubt worked with on Push and Shove.
Brixton Angels (Anthony Gorry and Steve Sidelnyk)
No Doubt are confirmed to be working with UK production duo Brixton Angels, made up of Anthony Gorry and Steve Sidelnyk. They started collaborating in November of 2011 up until February of 2012. With Gorry traveling back and forth from Santa Monica, California to London, he continued to keep fans updated on his progress via Twitter. Gorry also revealed to fans that he was working on remixes for the album as well. Gorry Tweeted that he was working on "beautiful" No Doubt music.
Major Lazer (Wesley “Diplo” Pentz and Dave “Switch” Taylor)
Being friends with Tony Kanal and remixing for Gwen Stefani in the past (Diplo), dancehall and reggae fusion duo, Major Lazer, first approached No Doubt to appear on their album in June of 2011. "Push and Shove" actually ended up going on the band's album. Major Lazer joined No Doubt in the studio in June and then finished the track in Jamaica with reggae star, Busy Signal, whom also makes an appearance on the song.
Mark 'Spike' Stent (Producer/Mixer)
Mark has worked with the band previously on Rock Steady, "Stand and Deliver" and both of Gwen's solo efforts, Love.Angel.Music.Baby. and The Sweet Escape. The band first mentioned working with him again in January of 2008 and then confirmed it in September of 2010. No Doubt nicknamed him the "wizard".