The lead single from Avicii's Stories
album, "The Days" features guest vocals from the British pop singer Robbie Williams. The song is a guitar-driven power ballad, one of a number of tracks incorporating rock. "I wanted to take a step away from 'Wake Me Up
' and the folky stuff to explore my influences growing up," Avicii told Billboard
magazine, citing Toto and Queen. "There's no limitations."