Here are the week to week performances of Katy Perry's singles on the Billboard Hot 100. UPDATED: September 26, 2017     ONE OF THE  BOYS I Kissed A Girl (2008)  *14 weeks in Top 10* 1st Week: #76 2nd Week: #40 3rd Week: #21 4th Week: #5 5th Week: #4 6th Week: #2 7th Week: #1 - PEAK POSITION 8th Week: #1 9th Week: #1 10th Week: #1 11th Week: #1 12th Week: #1 13th Week: #1 14th Week: #3 15th Week: #4 16th Week: #4 17th Week: #10 18