"Summer Bummer" is a song by American singer and songwriter Lana Del Rey featuring American rappers ASAP Rocky and Playboi Carti featured on her fourth studio album Lust For Life. The song was released for digital download on July 12, 2017, alongside "Groupie Love" featuring ASAP Rocky, as a promotional single with the pre-order of the album. It was later sent to UK contemporary hit radio on July 28 as the album's third single. The song was written by Del Rey, Matthew Samuels, Rakim Mayers, Playboi Carti, Tyler Williams, Jahaan Sweet, and Andrew Joseph Gradwohl, Jr, with the production being handled by Boi-1da, Sweet, and Rick Nowels.

Anna Gaca of Spin stated "Even as it widens—slightly—the range of her catalog, 'Summer Bummer' is best viewed as a classically Lana Del Rey set piece: a heavily stylized soundtrack for drugs, pools, and high-contrast monochromes. 'White lies'—or maybe that's, ahem, 'white lines'—'and black beaches/And blood red sangrias', she sings later, mirroring a color scheme that dates back to 'Off to the Races'. Sonically, 'Bummer' is like a trap-inspired take on Honeymoon's High by the Beach, and thematically, it doesn't go anywhere that song didn't already."Pitchfork's Rebecca Haithcoat said "[Summer Bummer] is not a traditional contender for the song-of-the-summer flower crown. It's sticky, but in a dense and oppressive, not light and carefree way. Even in Del Rey's songs with a cooler temperature, there's a humidity to her voice, a thickness that slows her tongue. Listless delivery paired with such vivid description is a hallmark of her work, and here it functions as a cocoon you don't want to escape even as you feel the knife's edge of danger. ASAP Rocky and Playboi Carti's contributions feel a little unnecessary, as Del Rey has no trouble carrying a track on her own. Near the end, her voice suddenly jumps an octave and, for a moment, floats sweetly atop the roiling fever dream."

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