Adele has revealed that for her fourth album she worked with some heavyweight producers including Max Martin and Inflo.The singer, who gave two wide-ranging interview to Vogue and British Vogue earlier this week, confirmed that no guests appear on her new album but that she had production and songwriting from some of pop music’s most notable figures.Swedish hit giant Max Martin, who’s worked with Taylor Swift, Coldplay, The Weeknd and many more acts, is among them.