"Better When I'm Dancin'" is a song recorded by American singer-songwriter Meghan Trainor for the soundtrack to the film The Peanuts Movie, based on the popular comic strip of the same name created by cartoonist Charles M. Schulz.

Backed by an instrumentation of salsa-inspired drums, the tropical song has house influences and optimistic lyrics that were inspired by Trainor's fans.

[6] Carolyn Menyes of Music Times stated that the song is "perfectly fitted for a children's movie but won't break much out of that space", the reason being that it is "overly cutesy".

[12] Time included it in their list of the Top 10 Worst Songs of 2015, criticizing how little the lyrics relate to the Peanuts franchise and noting that their "attitude of high-spirited joy aren't (sic) matched by a blandly indifferent delivery".

[21][22] Additionally, it peaked at numbers 99, 29 and 17 on Venezuela's Record Report, Pop General and Top Anglo charts, respectively, and received a Gold certification in Poland.

[27] Several of Trainor's relatives traveled to Los Angeles to appear in the video, including her aunt and uncle, Lisa and Burton Toney, and their three children.

Her high school friend Lily Harrington and father Gary Trainor also made cameos, while her mother filmed the making of the video.

[28] In the music video, Trainor wears a red, long-sleeved dress and performs choreography at locations such as a diner and a street corner.

[12] Writing for Idolator, Mike Wass described it as "a suitably lighthearted affair", commenting that its "retro look" is similar to Trainor's previous music videos, with the singer "rocking vintage fashions and working behind the counter of an old-school diner".

[31] Trainor performed "Better When I'm Dancin'" and "Good to be Alive" during selected shows of her MTrain Tour, such as on July 24 in Los Angeles and August 6 in Boston, prior to their release.