Billie Eilish posts teen pics as Justin Bieber fan as he talks ‘protecting’ her

Justin Bieber and Billie Eilish previously collaborated on a remixed version of her hit song Bad Guy (Yui Mok/PA/Evan Agostini/AP)
Justin Bieber and Billie Eilish previously collaborated on a remixed version of her hit song Bad Guy (Yui Mok/PA/Evan Agostini/AP)