"Add Some Music to Your Day" is a song written by Brian Wilson, Joe Knott and Mike Love for the American rock band The Beach Boys. It was first released as a single in February 1970. While making no impact overseas at all (a rarity for the band), early US orders were said to be at near-record levels for Warners and the song quickly entered Top 30 in Los Angeles, New York, Boston, and Salt Lake City, and climbed well into the Top 20 in St Louis, Nashville, Lincoln and Orlando. There it stopped, stalling nationally at #39 in Record World, #49 in Cash Box, #64 in Billboard, and #43 in Canada. It was then released on the band's 1970 album Sunflower.

According to the liner notes of the 2000 re-issue of the Sunflower album, Joe Knott was not a professional songwriter. In the liner notes, Brian Wilson said of the song, "It was written by me and Mike and Joe Knott, who was a friend of mine who wasn't a songwriter but he contributed a couple of lines. But I can't remember which ones!".

The lead vocal is shared between all of the band members except for Dennis.

The song was performed live in 1970, but disappeared from the Beach Boys' set list until the early 1990s. The song can be heard on a recording of a 2/28/1970 performance in Seattle, Washington where Brian made a rare concert appearance.

Brian Wilson performed the song regularly during his solo tours with Wilson the sole lead vocalist.

During The Beach Boys 50th Anniversary Tour the song was played at most shows at the beginning of the 2nd set with The Beach Boys gathering around Brian Wilson's piano. The vocal was then shared by Brian Wilson, Mike Love, Al Jardine and Bruce Johnston.

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