I Kissed A Girl - Chart Performance

Chart Performance

"I Kissed a Girl" debuted at number seventy six at Billboard Hot 100. After a couple of weeks, the single hit the top five, due to the rising digital downloads and increasing radio airplay. It continued to rise the next week, reaching number two, just behind her labelmates, Coldplay. The following week, the song peaked at the summit of the Billboard Hot 100, becoming the 1000th number one song of the rock era (the 961st number one single on the Billboard Hot 100). In addition the song also gave the Capitol label two consecutive Hot 100 number one singles, as the week's prior number one was fellow Capitol artist Coldplay's "Viva la Vida", making it the first time since 1976 Capitol has had two back to back chart toppers on the Hot 100. The single also crossed over to Billboard's sister publication R&R's Rhythmic chart in its July 5 issue, where not only did she have the highest debut ever for a non-rhythmic track, entering at number twenty six with 1,065 spins, she also had the highest debut from a new artist in over five years. The bow is the best for a debut track at Rhythmic since Beyoncé entered at number twenty one with "Crazy In Love" in 2003. It also became the first song since Gnarls Barkley's "Crazy" to simultaneously appear on the Mainstream Top 40, Rhythmic, Adult Top 40 and Alternative charts. On July 26, 2008, the track also made history by reaching the number one spot on Billboard's Hot Dance Airplay chart by three weeks, a first for a solo act with a debut single. The song topped the Hot 100 for seven weeks in a row before finally being dethroned by Rihanna's "Disturbia". It is the second longest running number one on the Hot 100 of 2008 (tied with "Whatever You Like"), with only Flo Rida's "Low" topping the chart for longer. As of September 2011, the song has sold more than 4,131,000 downloads in the United States.

In the United Kingdom, the single debuted at number four on the UK Singles Chart on August 3, 2008 ― for the week ending date August 9, 2008. A week later, it topped the chart, where it remained for five weeks (a feat which would not be matched again until "Someone Like You" by Adele in 2011) until it was dethroned by "Sex on Fire" by Kings of Leon. Alongside Basshunter's "Now You're Gone" and "Mercy" by Duffy, "I Kissed a Girl" spent more weeks at number one on the UK Singles Chart than any other single in 2008. According to the Official Charts Company, the single has sold over 635,000 copies in Britain as of June 2010. It is the first Virgin label single to sell more than half a million copies since the Spice Girls' "Goodbye" in 1998. As of March 2012, the single had sold 654,560 copies in the United Kingdom, becoming her third best-selling single there behind "Firework" and "California Gurls".

In Canada, the single debuted at number fifty five on the Canadian Hot 100, later peaking at number one, becoming the first country where the song reached the pole position.

In New Zealand, the song debuted at number thirty eight on the New Zealand Singles Chart, the single's first appearance in other countries chart outside North America, moving to number three the following week. The song was certified Gold after seven weeks with sales of over 7,500. On August 11, 2008, eight weeks after debuting on the chart, "I Kissed a Girl" finally made it to number one. "I Kissed a Girl" was certified Platinum in New Zealand after 20 weeks selling 15,000+ copies.

In Australia, the song debuted at number thirty on downloads alone. The next week, it jumped to number two, still on downloads alone. It later jumped to number one still solely off downloads, becoming only the second single to do so. Ironically, by the time the song topped the chart, this was the time when World Youth Day 2008 had started and the event held anti-gay views. On July 21, 2008, after the singles physical release, the track retained its number one position and was certified Gold. The single has held the number one position for several weeks and was certified 2× Platinum.