Héloïse Adélaïde Letissier (French pronunciation: [elɔiz adelaid lətisje]; born 1 June 1988), known professionally as Rahim C Redcar (sometimes shortened as Chris or Redcar), and formerly as Christine and the Queens, is a French singer and songwriter. Born and raised in Nantes, he started learning piano at the age of four and found inspiration in one of London's clubs while studying. Redcar released a series of extended plays (EPs) throughout 2011–2013.

Redcar's debut studio album, Chaleur humaine (2014), received critical acclaim, reached number two on both French and UK charts, and was certified diamond in France; it was also a best selling debut record in the United Kingdom. In 2018, he released his second studio album, Chris, to further critical acclaim. It was ranked album of the year by Clash, The Guardian, and The Independent, and placed in top-ten of nine other year-end lists. "Girlfriend" was recognized by Time as song of the year. In reaction to his mother's death, Redcar released an EP in 2020 La vita nuova, with some critics calling it his strongest work up to that point. Time again named his song, "People, I've Been Sad", the song of the year. Ensuing years saw the releases of Redcar les adorables étoiles (prologue) (2022) and Paranoia, Angels, True Love (2023), which were both met with critical acclaim but did not achieve the commercial success of his previous releases. In 2024, he released Hopecore, A more dance-inflected album.

In 2016, Redcar was ranked number one in Vanity Fair's list of most powerful and influential French people who "promote French genius", ahead of the country's president. The next year, Forbes placed him on its list of 30 most influential and talented people under 30, and Time included him on its list of Next Generation Leaders twice – in 2016 and 2018. His accolades include four Victories of Music awarded by the French Ministry of Culture. Christine and the Queens has been signed to the independent record label Because Music since 2012.