Katy Perry, 26, is on pace to the the first female artist in the 52-year history of The Billboard Hot 100, to have five #1 hits on a single album. That is if her latest single, Last Friday Night (T.G.I.F.), can reach the top spot. The song is currently at the #4 spot on the chart, but is expected to climb again next week.
Her later album, Teenage Dream has already had four singles reach #1: E.T., Teenage Dream, California Gurls, and Firework. I Kissed a Girl, from her previous album, also spent time at #1 on The Billboard Hot 100.
The only other artist to have five songs on a single album reach #1 was Michael Jackson, with his album Bad.