 " Unfaithful " debuted at number 51 on the US Billboard Hot 100 chart on May 13 , 2006 . The same week , Rihanna 's previous single " SOS " reached number one . " Unfaithful " peaked at number 6 on July 22 , 2006 , after 10 weeks on the chart , and became Rihanna 's third top ten single in the US . On July 29 , 2006 , " Unfaithful " also topped the US Hot Dance Club Songs chart , becoming her third number one there . The song was certified platinum by the Recording Industry Association of America ( RIAA ) on July 27 , 2006 , after more than one million downloads were shipped . " Unfaithful " was more successful in Canada where it reached number one on the Canadian Singles Chart . In Australia , the song entered the chart at number two , where it peaked , on July 30 , 2006 . It was later certified gold by the Australian Recording Industry Association ( ARIA ) , denoting shipments of 35 @,@ 000 copies . The same week , " Unfaithful " entered the New Zealand singles chart at number five . The next week , it peaked at number four where it stayed for three consecutive weeks . 
