Lorde was also the one who suggested they work it out on the remix Charli xcx revealed she didn't give Lorde a heads-up about her Brat song "girl, so confusing" until the day before it came out ...

The 27-year-old singer, who mysteriously deleted all of her social media posts ... sold over five million albums worldwide. Lorde teased two new songs last year. Picture by Joseph Okpako/WireImage.