Keeps Gettin' Better: A Decade of Hits is the first greatest hits album by American recording artist Christina Aguilera. It was released on November 7, 2008, by RCA Records. Its only single "Keeps Gettin' Better" was released in September 22, 2008 and entered the top 10 in the Billboard Hot 100 chart. The compilation contains tracks from all of the singer's studio albums released up to 2008: Christina Aguilera (1999), Mi Reflejo (2000), Stripped (2002) and Back to Basics (2006). The album also featured four new additions of which two were revisions of previous singles from Aguilera and two original songs being that of the lead single and a new addition named "Dynamite".
In the United States the album was released exclusively through retailer Target and was later made available digitally in September 2009 with the album release in stores elsewhere on February 2, 2010. Several versions of the album were made available for different regions in addition to a deluxe edition which featured a DVD of her past music videos. Being released only at Target, the album debuted at number 9 in the United States and sold 73,000 copies on the US Billboard 200 in November 2008. It entered the top 10 and was certified Gold in countries as Belgium; Ireland, Japan, Russia and the United Kingdom. The album has sold a total of 500,000 copies in the United States.
"It was tough looking back — it was surprising, it was really gratifying to see how much hard work I've put in over the last 10 years. When you're in it, you just don't realize as it accumulates how much you've done and how far you've come. I can't believe it's been a decade already. [On the album] I wanted to include all the songs that I know I loved and that are crowd pleasers and real staples of my career thus far."
Aguilera discussed the content and development of the album.
In 2008, Aguilera confirmed the release of her first greatest hits album, stating, "I'm looking forward to the next 10 years, which is partly why I named the album, Keeps Gettin' Better, 'cause it does". It was confirmed that Aguilera had signed the rights of the album distribution in the US exclusively to Target, with the album being released by her record label RCA which allowed people who pre-ordered the album receive a free digital download of the lead single "Keeps Gettin' Better". She stated the compilation was an introduction to future recordings saying "Once you hear the new material you'll have a very clear idea what the direction of it is".
The album features revisions of her previous singles with Aguilera calling them "reinventions". "Genie 2.0" is a revised version of "Genie in a Bottle" and "You Are What You Are (Beautiful)" is a revised version of "Beautiful". The compilation album also features new original songs; "Keeps Gettin' Better" and "Dynamite". The new album additions and remixes were produced by Linda Perry. Aguilera said about the new additions "This time around, I'm playing with this superhero element based on the fact that fans have grown up with me since I was 17 and have continually supported my changes throughout the years." Aguilera discussed the content of the album saying "I can't believe it's been a decade already [...] but it's very exciting. All the old, the biggest hits I've come out with [are on the album]. I don't even know how to describe what a journey it's been but it's been amazing."
The album received generally positive reviews from critics. Allmusic writer Stephen Thomas Erlewine said "Keeps Gettin' Better proves that no other teen pop singer of her era has a better track record than Christina and if the new songs are any indication, the title of this hits comp is no lie either." Nick Levine from Digital Spy noted the "spunky attitude" featured and compared her recordings to recording artist Britney Spears saying "She may have started out with similar material to another Mickey Mouse Club alumnus, but Aguilera moved on to bigger and better things more quickly than Britney, co-writing the lion's share of her second album, Stripped, and making her third, Back To Basics, a 2-CD pop-soul-jazz-blues opus." Chris Willman from Entertainment Weekly noted the lack of traditional Aguilera styles stating "The singer has banished melisma and belting from these electronic confections, and her chops sound just as hot set on simmer." He also compares the "You Are What You Are (Beautiful)" remix to John Lennon noting, "The real curiosity is a 'Beautiful' redo that imagines how John Lennon might've sounded if he'd lived into the age of electro." Nick Butler from Sputnikmusic positively received Aguilera's new recordings saying "Christina the pop singer is dead, long live Electro Christina. She couldn't signpost her new direction any more clearly if she announced the title of the next album as 'HAI GUYS KRAFTWERK WERE PRETTY COOL LOL I KNOW RITE?'. At any rate, these four tracks are more than enough to build anticipation for what could be a very, very good album."
In the United States the album debuted at number nine on the US Billboard 200 on the issue date of December 13, 2008. The album spent five weeks on the Top Catalog chart where it peaked at number 2 on the issue date of July 16, 2011. In the United States the album has currently sold over 495,000 copies. The album re-entered the Billboard 200 chart at number 45 on the issue date of July 26, 2011 In Australia the album debuted on the chart at number eight on the issue date of November 23, 2008, the album spent nine weeks on the chart and charted at number 49 on its ninth and final week on January 1, 2009. In Austria the album debuted at number ten on the Austrian Albums Chart on the issue date of November 21, 2008 spending five weeks on the chart, and charting at number 69 in its final week on December 19, 2008. In Belgium the album debuted at number 67 on the Flanders chart on the issue date of November 15, 2008, spending fourteen weeks on the chart peaking at position number 23. In Belgium's Wallonia chart the album debuted at number 100 on the issue date of November 15, 2008 spending seventeen weeks on the chart and debuting at number 24. The album has also been certified Gold in Belgium. In the Netherlands the album debuted at number 28 on the Dutch Album Chart. The album spent 11 weeks on the chart peaking at number 28. In Finland the album debuted at number nine spending six weeks on the chart. In Italy the album spent two weeks in the Top 20 chart peaking at number 15 on the chart. In Ireland the album peaked at number nine on the albums chart, and has since been certified Gold. In Sweden the album debuted at number 41 on the albums chart on the issue date of November 20, 2008 and spent five weeks on the chart. In the United Kingdom the album debuted at number ten on the chart and has since been certified Gold. It sold 20,000 copies in France in 2008.
"Keeps Gettin' Better" was confirmed as the lead single from the album and was sent to radio on September 22, 2008. An accompanying video saw Aguilera as Catwoman and performing in front of green screens. Aguilera performed the track at the 2008 MTV Video Music Awards where she dressed resembling "Catwoman". In the United States the single peaked at number 7, and elsewhere had a good commercial response charting at number 14 in the UK. "Dynamite", "Genie 2.0" and "You Are What You Are (Beautiful)" the new additions to the compilation album were released as singles via iTunes.
Promotion started on September 7, when Aguilera performed at the 2008 MTV Video Music Awards in Hollywood. She previewed the remade version of her first single "Genie 2.0" and later performed the lead single of the compilation, "Keeps Gettin' Better". Aguilera started her promotional tour on October 11, performing at the UK leg of the Thisday Africa Rising at the London's Royal Albert Hall, where she performed several old hits and the lead single of the greatest hits album. In late October, she was supposed to tour Eastern Europe, holding concerts in Moscow,Riga and Kiev. On November 23 Aguilera promoted the greatest hits album by performing at the 36th Annual American Music Awards. She opened the show with a seven-minute medley of her greatest hits, which included "Beautiful", "Keeps Gettin' Better", "Genie in a Bottle", "Dirrty", "Ain't No Other Man" and "Fighter".