Chris Cornell told Spin magazine in November 1999 that the song is about his then-wife, Susan Silver. The song finds him thinking of her from far away.
On "Moonchild," Cornell affectionately describes how his wife (and former Soundgarden manager), Susan Silver, "gets really freaked out during the full moon." Cornell and Silver were married from 1990-2004.
"Lean On" was originally sent by Major Lazer to both Rihanna and Nicki Minaj's camps as a slower reggae track. After both parties rejected the tune, Major Lazer recruited Danish singer MØ to supply vocals and recorded it themselves.
"Islands in the Stream" was originally written by The Bee Gees as an R&B song. It was originally written by the brothers for Marvin Gaye, however it was recorded instead as a duet by Kenny Rogers and Dolly Parton with the Gibb Brothers also contributing vocals.