The present invention provides methods and compositions for the stimulation of immune responses. Specifically, the present invention provides immunogenic nanoemulision compositions and methods of using the same to induce immune responses (e.g., immunity (e.g., protective immunity)) against a pathogenic virus of the paramyxoviridae family (e.g., a Paramyxovirinae virus (e.g., Paramyxovirus, Rubulavirus and/or Morbillivirus) and/or a Pneumovirinae virus (e.g., respiratory syncytial virus))). Compositions and methods of the present invention find use in, among other things, clinical (e.g. therapeutic and preventative medicine (e.g., vaccination)) and research applications.