Billie Eilish Pirate Baird O'Connell, known professionally as Billie Eilish, is an American singer-songwriter. Her debut single, Ocean Eyes, went viral and has accumulated over 87 million streams on Spotify alone as of July 2018. Her debut EP Don't Smile at Me was released in August 2017. Following the EP's success, Apple named Eilish as its newest Apple Music Up Next artist a month later in October 2017.

After the release of Ocean Eyes in October 2015, Eilish also released the single Six Feet Under. Ocean Eyes was rereleased worldwide through Darkroom and Interscope Records on November 18, 2016, to mainly positive critical reviews.

Following the success of the Ocean Eyes remixes, Eilish released the single Bellyache on February 24, 2017.Bellyache was produced and co-written by Finneas O'Connell, with a music video directed by Miles and AJ being released on March 22, 2017. On March 30, Eilish released the track Bored as part of the soundtrack to the television series 13 Reasons Why. On June 30, 2017, Eilish released the single Watch with a follow-up single, Copycat released on July 11, 2017, along with the announcement of her debut EP, Don't Smile at Me. Each Friday in July, Eilish would add another single to the EP. It was in this manner that the singles Idontwannabeyouanymore and My Boy were released.Don't Smile at Me was released on August 12, 2017. After the release, Eilish collaborated with American rapper Vince Staples for a remix of Watch titled &Burn, which was later included on a re-release of the EP. In January 2018, Eilish announced the Where's My Mind Tour, which wrapped in August 2018.

For the Record Store Day of 2018, Eilish announced a 7" vinyl featuring an acoustic version of her song Party Favor and an acoustic cover of Drake's Hotline Bling.

Eilish collaborated with American singer Khalid for the single Lovely, which was released in April 2018 and added to the soundtrack for the second season of 13 Reasons Why. That year also saw the release of singles Bitches Broken Hearts and You Should See Me in a Crown.

She has won a People's Choice Award, multiple MTV Awards, and Teen Choice Awards.

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