"Complicated" is a song by Avril Lavigne and was her first single, released in 2002 from her debut album, Let Go. It was written by Lavigne and The Matrix (Scott Spock, Lauren Christy, and Graham Edwards), and produced by The Matrix. The single reached number two on the United States Billboard Hot 100, number three in the United Kingdom and number one in Australia, Norway and Mexico. Based on its chart performance, the song is Lavigne's second most successful single and was one of the most successful releases of 2002.
The song was ranked at number 197 in Blender magazine's "The 500 Greatest Songs Since You Were Born". It has a parody by "Weird Al" Yankovic called "A Complicated Song". It is featured on the video game Karaoke Revolution. Complicated was the biggest hit of 2002.
The video, directed by The Malloys, starts with Lavigne asking her bandmates if they want to "crash" the mall. They respond with enthusiasm, and skateboard there. Some shots show Lavigne on guitar playing with her band in a skatepark; others show her with the band at the mall playing around with clothes and jewelry, throwing objects, and harassing employees. Lavigne's brother and sister appear as extras in the video.
| Chart (2002) | Peak position |
|---|---|
| Brazil - Hot 100 | 1 |
| Argentine Top 40 | 3 |
| Australian ARIA Singles Chart | 1 |
| Austrian Singles Chart | 2 |
| Belgian Ultratop 50 (French) | 5 |
| Belgian Ultratop 50 (Dutch) | 3 |
| Canadian BDS Airplay Chart | 45 |
| Canadian Singles Chart | 21 |
| Danish Singles Chart | 2 |
| Dutch Singles Chart | 4 |
| Finnish Singles Chart | 17 |
| French Singles Chart | 21 |
| German Singles Chart | 3 |
| Irish Singles Chart | 1 |
| Chart (2002) | Peak position |
|---|---|
| Italian Singles Chart | 2 |
| México Top 100 | 12 |
| New Zealand RIANZ Singles Chart | 1 |
| Norwegian Singles Chart | 1 |
| Swedish Singles Chart | 2 |
| Swiss Singles Chart | 2 |
| UK Singles Chart | 3 |
| U.S. ARC Weekly Top 40 | 1 |
| U.S. Billboard Adult Contemporary | 13 |
| U.S. Billboard Hot 100 | 2 |
| U.S. Billboard Latin Pop Airplay | 28 |
| U.S. Billboard Latin Tropical/Salsa Airplay | 20 |
| Venezuelan Singles Chart | 1 |
| United World Chart | 1 |
| Region | Date | Label | Format | Catalog |
|---|---|---|---|---|
| United States | April 23, 2002 | Arista Records | CD, digital download | |
| Europe | July 8, 2002 | Sony BMG | CD, digital download | 74321 94576 2 |
| United Kingdom | August 12, 2002 | Arista Records | CD, digital download | |