"Bon Appétit" is a song by American singer Katy Perry featuring American hip hop group Migos. The track is a dance-pop song with sexual double entendres involving food. It was released on April 28, 2017, as the second single from her upcoming fifth studio album, Witness. Its music video followed on May 12, 2017, and features Perry being prepared and served by chefs as a meal.

"Bon Appétit" is a disco-infused dance-pop and trap-pop song with a duration of 3 minutes and 47 seconds. At the 59th Annual Grammy Awards, Perry described it as "pretty sexual" song that was part of "some of that good 'ol Katy Perry, fluffy stuff that you love so much". According to Hugh McIntyre from Forbes, the track's rhythm features "breezy, summery, 90's-invoking vibes" and a beat that gradually builds, eventually becoming "undeniable".MTV writer Sasha Geffen calls the track, "a smorgasbord" of double entrendres with food. In the song, Perry sings "I'm all that you want, boy/All that you can have, boy/Got me spread like a buffet/Bon appétit, baby".

On April 24, Perry sent out a recipe for the "World's Best Cherry Pie", teasing the song's release. Fans sent photos of their completed pies to Perry on Twitter where she said they "may get a surprise" and rated their pies. Perry subsequently announced the track's release two days later. Capitol Records released it for download on April 28, 2017, as the second single from her upcoming fifth studio album. To promote the song on the day of its release, Perry went to Times Square in a food truck to hand out cherry pies to fans. Three days later, she and Migos performed it at the 2017 Met Gala after Perry also sang her songs "Chained to the Rhythm", "Dark Horse", and "Firework". According to Vogue, "Bon Appétit" was the highlight of the show, writing the performance was where "things really got going", concluding "that's how you wrap up a Met Gala."

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