No. 6 Collaborations Project
began with an idea Sheeran had about doing a cover version of Labelle's "Lady Marmalade
" with some of the biggest male pop stars, such as Bruno Mars and Justin Bieber. The plan was to echo the all-female cover recorded in 2001 for the soundtrack of Moulin Rouge
by Christina Aguilera, Mýa, Lil' Kim and Pink. When Sheeran pitched the idea over the phone to Mars, the singer indicated that he would prefer they record something new together. The resulting track, "Blow," became the first one recorded for the album.