"★" (pronounced and stylized as "Blackstar") is a song by English rock musician David Bowie. It was released as the lead single from his twenty-fifth and final studio album of the same name on 19 November 2015. "Blackstar" peaked at number 61 on the UK Singles Chart, number 70 on the French Singles Chart and number 78 on the Billboard Hot 100. "★" received both the Grammy Award for Best Rock Song and the Grammy Award for Best Rock Performance at the 59th Grammy Awards.

"Blackstar" is an art rock and jazztronica song. Also described as an "avant jazz sci-fi torch song," it features a "drum and bass rhythm, [a] two-note tonal melody with hints of Gregorian chant, [and] shifting time signatures." In the bluesy slow middle section, the song shifts from an acid house-ish groove to a languid, R&B-flavored interlude.

The song was originally over eleven minutes long, but after learning that iTunes would not post singles over ten minutes in length, Bowie and Visconti edited it down to 9:57, making it Bowie's second-longest track behind "Station to Station". Bowie did not want to confuse listeners by releasing different single and album versions.

"Blackstar" was released on 19 November 2015 as a digital download. In addition to its release on the album of the same name, the track is used as the opening music for the television series The Last Panthers.

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