"Lazy Sunday" is a song and short video by American comedy troupe The Lonely Island. It was released on December 17, 2005 when it was broadcast on Saturday Night Live as their second Digital Short. Primarily performed by Andy Samberg and fellow cast member Chris Parnell, the song and accompanying music video follow the two comedians as they eat cupcakes from the Magnolia Bakery, buy snacks at a convenience store, and smuggle the food into a Sunday afternoon matinee of The Chronicles of Narnia.

The song was written by Samberg and Parnell, as well as Lonely Island members Akiva Schaffer and Jorma Taccone, in one night. They recorded the following night in the comedy troupe's office and shot the music video around Manhattan two days later using a borrowed camera. After being quickly mixed and edited by Schaffer, the short was approved for broadcast on the next evening's telecast of Saturday Night Live by producer Lorne Michaels.

Although the writers initially worried the studio audience would respond to the short negatively, the video received a positive reception and enjoyed Internet stardom overnight, with multiple bootleg copies surfacing on video-sharing website YouTube, catapulting the awareness of the then-fledgling website. The song and video brought forth positive critical reception, with many hailing it as a revival for the stagnant series. In retrospect, commentators have named "Lazy Sunday" as one of the best Saturday Night Live moments of the 2000s.

The track "Lazy Sunday" and its accompanying music video follow the two cast members (Parnell and Samberg), who adopt the brash personas of hardcore rappers. The song follows their quest to achieve their "ultimate goal" of attending a matinee of the fantasy film The Chronicles of Narnia: The Lion, the Witch and the Wardrobe. The lyrics involve subjects that are "anything but hardcore," such as eating cupcakes from the Magnolia Bakery, searching for travel directions on MapQuest and buying tickets with $10 bills. Samberg described the lyrics as "two guys rapping about very lame, sensitive stuff."

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