Pop stars in general aren't taken very seriously, but Katy has been taken seriously on more occasions than Gaga, and this will continue with her future mature hits from PRISM vs Gaga's constantly naked imagery and lyrics about eating aphrod-i-sy oysters.
Poor Kety fans they try so hard to make Kety respectable. See Gaga is working with the muppets, see she's being childish. That kind of response is as childish as it gets.