There's no rulebook for pop, that's the beauty of it. At it's heart is a universality and freedom that makes it all so joyous. Someone who understands that better than anyone is Danish pop polymath Karen Marie Ørsted, aka MØ, aka the world's best pop star. Having established herself with the raw, DIY-tinged agit-pop of 2014's hugely influential debut album No Mythologies To Follow, she's since expanded her sound and artistic vision via collaboration with a broad spectrum of some of music's most interesting characters - from Diplo to Charli XCX to Cashmere Cat to SOPHIE. In 2015 she co-wrote and sang on one of the most streamed songs of all time in the shape of Major Lazer's global smash, Lean On (she'd later repeat the trick with their 2016 Justin Bieber collaboration, Cold Water, a UK number 1), while these features have been peppered with hits of her own, most notably last year's MNEK-produced Final Song, which broke the UK Top 15 and was a huge hit across Europe and Australia, and garnered MØ's first Gold record in the US as a solo artist. As work continues on her second album, due in 2018, she's unveiled a surprise six-track EP, When I Was Young, which aims to complete the circle that started with No Mythologies To Follow and hints at where she's headed next. "Putting out this EP is just something I've wanted to do for a long time, and I just felt it was right to put these songs out before I put out the album," she says. "I'm a super nostalgic person and so these songs, and the meanings behind them, all fit into this personal journey I've been on."