Green Day have shared their love for Billie Eilish, following the band’s onstage collab with the pop megastar at FireAid LA on January 30. In a new interview with Billboard from this weekend’s GRAMMYs – where Green Day were nominated for Best Rock Performance, Best Rock Song and Best Rock Album, but sadly didn’t win – they said that performing with Billie last month was “an honour”. Speaking about how he came to be a fan of his namesake in the first place, frontman Billie Joe Armstrong explained, “It’s funny, when she first started coming out, I saw some footage of her on Instagram – I saw some merch, and there was a headband that said ‘Billie’ with an ‘ie’, and I said, ‘I have to have that!’ And then so she sent me a bunch of merch that ha...