Medusa and Nostalgia place interpretation alongside her songwriting. Those releases offer listeners a way to hear how her voice approaches existing repertoire, rather than assuming that every recording is an original composition.

Public-service work is another documented part of her career. The Recording Academy records her SING campaign and recognition for humanitarian activity, which should be distinguished from music awards and commercial brand partnerships.

Nostalgia, released in 2014, draws mainly on standards from the 1930s and 1940s. Its programme includes I Put a Spell on You, Summertime, Strange Fruit and Mood Indigo. These are interpretations of earlier repertoire, so the singer's performance should be distinguished from the songs' original authorship.

Lennox recorded the album with longtime collaborator and co-producer Mike Stevens at his West London studio. The announcement describes the two playing much of the music themselves. The project therefore offers a different creative setting from both Eurythmics' duo recordings and the original songs associated with Diva.

She also developed the packaging and discussed the song choices in material included with the deluxe edition. For listeners moving beyond the best-known singles, Nostalgia opens a route toward the earlier singers and traditions behind the repertoire, while retaining Lennox's own vocal interpretation.