"Cha Cha Cha" is a song by American singer Bruno Mars from his fourth solo studio album The Romantic (2026). It was produced by Mars himself and D'Mile.
The song is composed of drums, strings, guitars, congas and brass. It contains Latin music influences, such as a Latin jazz flourish in the opening, a "percolating clave rhythm", and features of the musical style associated with the titular dance, and borrows the Philadelphia soul rhythm of "Back Stabbers" by The O'Jays, including a pause that leads into the chorus. Bruno Mars interpolates "Slow Motion" by Juvenile featuring Soulja Slim on the chorus. The song shifts into a disco groove during its final minute.
The song received generally positive reviews. Andrew Unterberger of Billboard ranked it as the best song from The Romantic, describing the strings as "sweetly uneasy" and praising the song for "using a well-plotted Juvenile lift to capture sweaty dancefloor rapture, before the groove takes flight into pure disco ecstasy in the final minute." Alexa Camp of Slant Magazine wrote it "works itself into a nice groove in its final third". Reviewing The Romantic for Riff, Vera Maksymiuk called it one of the album's "most playful experiments", stating that the song's transition from Latin to disco "showcases Mars' ability to merge genres without sacrificing cohesion." Likewise, AllMusic's Andy Kellman cited the song as an example in which "Mars and company remain clever at combining sounds". Paolo Ragusa of Consequence wrote that "Mars croons a la Luis Miguel" on the song, "bringing all the suave energy he can muster." Nick Levine of NME called the song a "slinky floor-filler". Variety's Chris Willman opined that the song's Latin elements and interpolation of "Slow Motion" were a "nice combo", while Pitchfork's Brittany Spanos described the interpolation as "surprisingly playful". Sam Rosenberg of Paste had a more negative reaction to the song, commenting that its "endless vamping" cannot "disguise the repetitive, unimaginative quality of Mars and his collaborators' songwriting."