The study of particle production in high-multiplicity pp collisions has revealed unexpected collective effects. In order to investigate these features, particle yields as a function of event activity are measured by ALICE. The interplay between soft and hard processes is studied by measuring both heavy- and light-flavour particle yields as a function of charged particle multiplicity. In this work we present selected ALICE results of self normalised yield as a function of self normalised charged-particle multiplicity, measured in pp collisions.