at number 98 on the Billboard Hot 100 in the U.S., where it eventually rose to number 86; by comparison, Simpson's first single, "Pieces of Me", had reached number 5 on the Hot 100 a few months earlier, and her second single, "Shadow", had reached number 57. Despite this relatively low chart peak, "La La" was credited with helping boost the sales of Autobiography, which rose on the charts from number 42 to number 33 (with a 61% sales increase) in one week in December 2004, soon after the single's debut. The single was certified gold by the Recording Industry Association of America (RIAA) in late March 2005; in Australia, it was also accredited as a gold single. "La La" was used as the backing music for a ThermaSilk shampoo commercial. It was also covered in the rhythm-based 2006 Nintendo DS game Elite Beat Agents. Description "La La" is the most rock-oriented track on Autobiography, and was described in a BBC review of the album as "energetic". Another review called it a "punk inspired, fast beat, screaming anthem". Reactions to the song have been mixed, however: People magazine called the song "insipid" in its review of the album, and Allmusic said that Simpson was "trying way too hard to be sexy." Rolling Stone said the song casts Simpson "as a barely legal temptress", and said "ironic or not, it's creepy." Billboard was more positive, saying that "La La" (in which it said Simpson was a "frisky bad girl") was one of the songs that could "keep Autobiography on the charts in the foreseeable future." The abovementioned BBC review named the song as one of those on the album that it regarded positively, and another review said Simpson "summons a credible pop-punk sound" on "La La". The lyrics to the song are quite sexual, with "la la" being used as a euphemism for sex and a reference to Simpson dressing up as a French maid included; however, Simpson has described the lyrics as tongue-in-cheek: "It was one of those songs where every silly thing that was sexual that I could think of I put into the song." In one interview, Simpson said of the song: Music video and television performances Performances of "La La" featured twice in the first season of The Ashlee Simpson Show, Simpson's reality show, which aired in the U.S. on MTV from mid-June to early August 2004: