"Ka-Ching!" is a 2003 song by Canadian singer Shania Twain. It was the second international single released from her 2002 album Up!. The song was written by Robert John "Mutt" Lange and Shania Twain. "Ka-Ching!" was the second release to Europe and Central American markets following "I'm Gonna Getcha Good!". "Ka-Ching!" has become one of Twain's most successful singles in Europe to date. The song deals with consumer culture in the United States through the boom years of the 1990s and early 2000s. The line "all we ever want is more" is the general theme of the song.

The song was written by Robert Lange and Shania Twain. Lyrically, the song deals with what it considers to be the greed in the world. The tongue-in-cheek lyrics look at how our world revolves around money. It features an opening similar to Pink Floyd's "Money". According to Jennifer Nine from Yahoo! Music, "it's essentially Radiohead's "squealing Gucci little piggies" served up for those without Oxford educations and Naomi Klein's Guardian columns: "We spend the money that we don't possess/Our religion is to go and blow it all".

"Ka-Ching" centres on Consumerism. Opening with sound of a cash register ringing, Twain then sings that the U.S. teaches children to want and want and want ("we live in a greedy, little world/that teaches every little boy and girl/to earn as much as they can possibly/then turn around and spend it foolishly") and that the adults don't know how to spend their money wisely, either ("we've created us a credit card mess.") And as soon as the money is there, people will go to the new churches — the malls ("Our religion is to go and blow it all/so it's shoppin' every Sunday at the mall.") In the chorus, Twain sings the satisfaction and fulfillment people find in buying and having more money and things ("Can you hear it ring/it makes you wanna sing/it's such a beautiful thing -- Ka-ching!").

In the second verse, she sings that the shallow, materialistic people are irresponsible and will go to drastic lengths, including risking foreclosure on their home to buy more stuff: "when you're broke go and get a loan/take out another mortgage on your home/consolidate so you can afford/to go and spend some more when you get bored." She taunts them in the bridge, singing, "Dig deeper in your pocket/Oh yeah/Come on, I know you've got it."

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