"Playground" (alternatively known as "Another Lonely Day" or "Doijroij") is an unreleased song by Lana Del Rey, recorded in 2010. The final version was leaked on November 18, 2014. The producer of the song is The Flight and it is not registered on any known service.
The song was first leaked on August 8, 2013 as "Playground (No Rap)" and featured only the chorus of the track, leading many to suspect that another guest vocalist was expected to rap over the instrumental breaks, although nothing surfaced. Prior to this, on July 20, a blog had posted a snippet of a song titled "2011 ideas". The snippet was around 23 seconds long and featured low quality vocals by Del Rey rapping over the instrumental of "Carmen". The same blog posted another snippet on September 13, titled "2011 ideas continued", this time featuring the instrumental, and part of the chorus of, "Summer of Sam". The song was finally leaked in full on November 18, 2014.
- Direct reference to "Scarface" and "Live Forever" - the former is also referenced in "Live or Die" and "Never Let Me Go".
- "Rain, rain, go away now / come again another day now" is a reference to the nursery rhyme "Rain Rain Go Away"; "ring around the rosie, ah / I don't wanna fall down" is a reference to the nursery rhyme of the same name.