On January 4, 2005, Simpson performed the song live at the halftime show of the Orange Bowl football game in Miami, Florida.

[5] Critics compared this poor performance to Simpson's revealing miscue on Saturday Night Live October 23, 2004, in which she had intended to perform "Autobiography" but the earlier recording of "Pieces of Me" was heard instead, showing that Simpson had been lip-syncing.

In October 2004 it was announced that its title track, "Autobiography", would be the third single; however, on October 29, it was announced on Simpson's official website that "Autobiography" would be replaced as the third single by "La La",[10] following Simpson's Saturday Night Live incident.

[11] In Ireland, it debuted at number 18 on that country's chart in late January and stayed there in the next week.

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.

It was also covered in the rhythm-based 2006 Nintendo DS game Elite Beat Agents.

[15] Another review called it a "punk inspired, fast beat, screaming anthem".

"[18] Rolling Stone said the song casts Simpson "as a barely legal temptress", and said "ironic or not, it's creepy.

[24] It debuted on AOL's "First View" on November 22 and on MTV's Making the Video on November 23;[25] the making of the video was also featured in episode three of the second season of The Ashlee Simpson Show,[26] which aired in February 2005.

[27] The video takes place in a suburban setting and was filmed in Huntington Beach, California.

Simpson is seen singing the song, dancing on top of a car, in front of a donut shop, and laying on a couch playing Tony Hawk's Pro Skater 3 and Tony Hawk's Pro Skater 4 on Xbox, all during daylight.

One of her U.S. performances, at the Orange Bowl football game halftime show in early January (her first time performing in a stadium), was memorable for the harsh reception the song received from the audience, with "a discernible chorus of boos" after she finished singing, according to the Associated Press.

The cause of the booing she received has been variously attributed to a backlash against her because of her SNL incident the previous October, to the poor quality of her singing, and to the fact that the crowd was generally not in the same age bracket as her usual fans.