 In the United States , " Fighter " debuted at number 61 on the Billboard Hot 100 chart on April 12 , 2003 , becoming the week 's best @-@ debuting single . In the following week , it jumped to number 56 . On the issue dated April 26 , 2003 , the single charted at number 46 . In its fourth week charting , " Fighter " raised to number 38 . The single grew ten positions , charting at number 28 on May 10 . On May 17 , 2003 , it charted at number 22 . " Fighter " finally peaked at number 20 in its seventh week charting , becoming Aguilera 's ninth top @-@ twenty hit on the chart . On the Pop Songs chart , it peaked at number five . The single also peaked at number 28 on the Adult Pop Songs . On November 1 , 2003 , " Fighter " was certified gold by the Recording Industry Association of America ( RIAA ) for shipping more than 500 @,@ 000 copies in the country . As of August 2014 , the single has sold 1 @,@ 184 @,@ 000 million digital units in the United States . On the Canadian Singles Chart , it peaked at number three . 
