"A few months ago, someone sent me a tweet that Kim Kardashian had posted, 'This time I'll be Bulletproof.' I was like, 'Now that's really weird.' When we were writing it in a living room in south London, we didn't think it'd be reaching multi-millionaires in L.A." La Roux's ELLY JACKSON is shocked socialite KIM KARDASHIAN is a fan of her hit track BULLETPROOF.