This features London grime MC D Double E. Tinchy Stryder told NME: "D Double - I've grown up listening to him and respecting him. Funny enough I've never been on a song with him. I've always wanted that. That's how the whole idea came up of 'Leg Day', because discussing it we said 'bro, you're match fit, you've been around, you're' - I'm still small but - 'you're growing.'"
The Prince-penned "Manic Monday" was the first song The Bangles heard coming from a car radio, but "Eternal Flame" is closest to Susanna's heart, perhaps because she sang it in "various states of undress."