I Knew You Were Trouble , the song , opened at number 3 on the Billboard Hot 100 , in the US .
Due to strong digital sales , the song debuted at number three on the Billboard Hot 100 chart in the United States , selling more than 416,000 copies within its first week ; it later peaked at number two in January 2013 , blocked from the top spot by Bruno Marss `` Locked Out of Heaven '' .
I Knew You Were Trouble