what do the lyrics interpret?
James Dinh of MTV noted that "the pop star appears strong, bold and just a tad resentful after a breakup" on the track.
Part of Me (Katy Perry song)
James Dinh of MTV noted that "the pop star appears strong, bold and just a tad resentful after a breakup" on the track. 
katy perry this is the part of me song UNANSWERABLE who wrote the lyrics of this? Katy Perry and Bonnie McKee who is the second person? American singer and songwriter
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Part of Me (Katy Perry song) [SEP] Composition and lyrical interpretation
Edna Gundersen from" USA Today" stated: "Katy Perry could be addressing her ex or her detractors on this defiant slapdown, a gleaming "Firework"-like pop torpedo propelled by slick beats and a brazen chorus." Chris Ryan, also of MTV, inferred that the song was aimed at Perry's ex-boyfriend Travie McCoy, while "New York" magazine journalist Amanda Dobbis described it as "another break-up anthem". Fans and media noted differences in the lyrics between the demo and the single, and claimed that the changes redirected the song's subject from McCoy to Perry's ex-husband Russell Brand, from whom she had recently divorced. Perry declared it was not about Brand, stating: I wrote it two years ago, which is funny because everybody is like "God, it sounds so current," and some people that I work with were like "You should just say you wrote it a couple of weeks ago." I'm like "I'm not a dick, I'm going to tell the truth." I wrote it two years ago when I was writing and recording Teenage Dream, [but] it didn't feel right on the record.