Billie Eilish is dropping into Fortnite ... Among those unlockable rewards is Eilish's neon green character skin and two Eilish-themed Instruments – a keytar and a microphone.

Billie Eilish just shut down the haters who have a problem with her signature neon green hair. The "Bad Guy" singer-songwriter, 19, who's become known for rocking the statement-making lime green ...