Total Fitness and thus, a limited CD single pressing was made available to people who joined the club. The song was also utilized for the company's promotional advertisement campaign. "A Little Bit" is a dance-pop song, composed in a "medium pop" tempo. According to the sheet music published at Musicnotes.com by Alfred Music Publishing, it is written in the key of E minor. Its beat is set in common time, and moves at a tempo of 94 beats per minute. It also has the sequence of Em–C–B/D as its chord progression. Simpson's voice in the song spans from the note of G3 to the high note of D5. Following the same beat-oriented pattern as "Irresistible", "A Little Bit" features piano instrumentation. Simpson sings the lyrics as rapid-fire verses and with start-and-stop hooks. Simpson adopts breathy vocals for the song, and the lyrics talk about what she expects from her partner: "A little more time, a little less wait / A little more heart, a little less break". She also demands healthy changes in the relationship. Critical reception "A Little Bit" garnered mostly positive reviews from music critics. Kirsten Koba of PopMatters gave a positive review, writing "with pop star sass, she belts out [...] proving that she's a girl with attitude — and fierce rhyming ability." Stephen Thomas Erlewine of Allmusic wrote that the song and "Irresistible" were "double-punch" on the album. Chuck Taylor of Billboard praised the song's production, writing that it "locks [this one] inside the head long after it's faded from the speakers." Larry Printz of The Morning Call also gave a favorable review, writing that the song "benefit[s]" from the start-and-stop hooks. Yushaimi Yahya of The Malay Mail, who was critical of the album as a whole, pointed out that Simpson sounded "decent" on the track. However, Chuck Campbell of Daily News noted Simpson's singing as "breathless whispers" and deemed the song as being "heavily processed." The song debuted at number sixty-two on the Australian Singles Chart, on the week dated November 5, 2001, which became its peak position. The single fell to number ninety-six the following week, and dropped out of the chart the week after. Promotion Music video The music video was filmed under the direction of Hype Williams to promote the single. The dance sequence was choreographed by George Hubela (known as GEO) and the video takes place in a futuristic spaceship-like setting