Keeps Gettin' Better: A Decade of Hits is the first greatest hits album by American recording artist Christina Aguilera. Released on November 7, 2008 by RCA Records, the compilation contains Aguilera's hits from all of her studio albums released up to 2008. It also featured four new additions: two of which are remade versions of her previous singles and the rest are two original songs, "Keeps Gettin' Better" and "Dynamite". Keeps Gettin' Better was released exclusively through Target retailer in the US.
Keeps Gettin' Better was reviewed favorably by music critics, who praised her musical career over her first decade entering the music industry. The compilation debuted at number 9 on the US Billboard 200 and sold 73,000 copies during the first week following its release. It entered the top ten charts of multiple countries and eventually achieved several certifications in regions worldwide. Its only single "Keeps Gettin' Better" debuted within the top ten of the US Billboard Hot 100, becoming Aguilera's first single to do so.
In November 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 announced that the album distribution rights in the US belonged to Target retailer via her record label RCA Records. People who would pre-order the compilation also received a free digital download version of the single "Keeps Gettin' Better". During an interview with the Los Angeles Times, Aguilera explained that Target "got such a great creative team", and that's why she worked with the retailer for the album. Released in November 2008, Keeps Gettin' Better features all of Aguilera's hits from her previous studio albums released up to 2008 and four new songs produced by Linda Perry. Two of which were "reinventions" of her singles, "Genie 2.0" from "Genie in a Bottle" "You Are What You Are (Beautiful)" from "Beautiful". The other new materials were "Keeps Gettin' Better" and "Dynamite".
The album received generally positive reviews from music critics. AllMusic writer Stephen Thomas Erlewine commented that 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" of the compilation and compared her recordings to those of Britney Spears, "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". He further complimented Aguilera's songwriting for her songs. 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".