Critical response The song received generally positive reviews from music critics. Harry Guerin of
RTÉ.ie wrote that "Just a Little Bit" was one of the tracks from
Real Girl that shows Buena at her best, and elaborated that it "establishes her soul credentials".
The New Zealand Herald critic Rebecca Barry Hill praised Buena's vocal performance on the song, which she characterised as "bluesy". Claire Allfree from
Metro regarded "Just a Little Bit" as one of the album's better tracks and described it as an "itchy opener". Alex Fletcher from Digital Spy gave the song a three out of five star rating and wrote, "It lacks that killer pop hook to make it anything more than a decent album track".
The Irish Times writer Kevin Courtney also rated the song three out of five stars and compared it to the success of her former bands' success: "It may not steal Subjugates' thunder, but it should grab a flash of the limelight". Mickey McMonagle from the
Sunday Mail commended Buena's vocal delivery, but admitted that the song is "slightly lacklustre at times" despite being a decent track.
The Independent's Andy Gill placed the song in his "Download this" category.
Chart performance Upon release, the single failed to become a commercial success in the UK, where reached number 65 on the
UK Singles Chart and charted for two weeks. ==Live performance==