Question: Besides Iggy Pop, which other singer who was known for her partnership with Serge Gainsbourg, contributed to the "We are the Lillies" project?

Context paragraphs:
L'Étonnant Serge Gainsbourg: L'Étonnant Serge Gainsbourg is the third album by French musician Serge Gainsbourg, released in 1961.  Like its predecessors, it features Gainsbourg backed by the Alain Goraguer Orchestra.

La Javanaise: La Javanaise is a song written and composed by Serge Gainsbourg originally for Juliette Gréco, and interpreted by both her and Serge Gainsbourg in 1963.  The first recordings of both artists constituted the B-sides of each of the two 45s.

Great Jewish Music: Serge Gainsbourg: Great Jewish Music: Serge Gainsbourg is a tribute album featuring the music of French singer/songwriter Serge Gainsbourg.  Executive-produced by John Zorn, it was released on Tzadik Records in 1997 as part of their series on "Radical Jewish Culture".

Sérgio Dias: Sérgio Dias Baptista Twice Latin Grammy Nominee (born December 1, 1950 in São Paulo), is a Brazilian rock musician, composer and guitar player.  He is best known for his work with the band Os Mutantes and has been the only consistent member of the band, appearing on every album since its formation.  In 2010 Sergio Dias collaborated with the band Tahiti Boy and the Palmtree Family in a project called "We are the Lilies", which also featured contributions from Iggy Pop and Jane Birkin.

Balla (musician): Balla (musician) is the musical alter-ego of Portuguese musician and record producer Armando Teixeira (musician).  Balla's music references the sound and style of Serge Gainsbourg and Jaques Brel, combined with hip hop and cut-and-paste references drawn from his time as DJ and producer with both Bizarra Locomotiva and the platinum selling Da Weasel.  The arrangements have been described as "reflecting a taste for sound composers like Barry Adamson".  Armando Teixeira is recognized as a composer, musician and producer of note within Portugal, and his 2006 studio album "A Grande Mentira" has been described by Portuguese public radio station Antena 3 as "pop, electronica, eroticism and fury".  "In this space, I have adopted the solitary writing of a Nick Cave or Iggy Pop" Balla has said of his own work.  When asked if Balla was the summary of his years spent in Bizarra Locomotiva or Da Weasel, he responded "Probably, yes... Any of these bands were very closed, while Balla represents freedom.  I am able to experiment a lot.  Here there is a little bit of everything that I have done."

Serge Gainsbourg N° 4: Serge Gainsbourg N° 4 is the fourth album by French musician Serge Gainsbourg, released in 1962.  It is his last to feature his original style blending chanson and jazz, with a more varied approach with Latino and twist influences.

Jane Birkin: Jane Mallory Birkin, OBE (born 14 December 1946) is an English-French actress, singer, songwriter, and model.  She attained international notoriety for her decade-long musical partnership with Serge Gainsbourg, and also had a prolific career as an actress in British and French cinema.

Jane Birkin/Serge Gainsbourg: Jane Birkin/Serge Gainsbourg (also known as Je t'aime... moi non plus) is an album featuring duets and solo performances by Serge Gainsbourg and his then lover, Jane Birkin.  It was released in 1969 and included the worldwide hit "Je t'aime... moi non plus", which achieved notoriety for its salacious lyrics with a backing of ecstatic female moaning, culminating in an apparent orgasm at the song's finale. )

Sarah Fimm: Sarah Fimm (born Sarah Lauren Freidman on September 18 in Tulsa, Oklahoma) is an American singer-songwriter, residing in Woodstock, NY.  She toured and collaborated with iconic singer Peter Murphy (of Bauhaus), and supported Delerium in 2008.  Her music has been featured on MTV's The Real World and Road Rules, Mark Hamill’s Comic Book: The Movie, D.E.B.S. (Soundtrack from the Motion Picture), and the Lifetime channel, among others.  Sarah Fimm’s voice can also be heard on Iggy Pop’s versions of Serge Gainsbourg’s ‘La Javanaise’ and ‘Et Si Tu N`Existais Pas’ (yet to be released).  Fimm plays piano and sings and writes her own songs.

Lolita Go Home: Lolita Go Home is an album by Jane Birkin, released in 1975.  About half of the songs were written by Serge Gainsbourg (music) and Philippe Labro (words).  The other half are old musical tunes.  "Rien pour rien" uses the same melody as Serge Gainsbourg's "Le Cadavre Exquis" (1975).

Supporting paragraphs: Sérgio Dias Jane Birkin
Answer: Jane Mallory Birkin