This collaboration with London producer George Fitzgerald is a straight-talking song about sex. Katy told The Sun: "Men get away with singing about what they like doing so why shouldn't we women? That one is for all my female fans for sure."
Robin Thicke and his mom, Gloria Loring are the first the first ever mother-and-son to have both tallied top 10 singles on the Hot 100 as solo artists or duos. Loring reached #2 with Carl Anderson in 1986 with "Friends and Lovers" and Thicke topped the chart in 2013 with "Blurred Lines."
Originally a chart-topper for Steve Lawrence in 1962 chart-topper, "Go Away Little Girl," became the first song of the rock era to be taken to #1 by two different artists when Donny Osmond's cover version also reached the summit in 1971.