You asked:

what songs did katy perry write

  • The songs that Katy Perry is an author of include Hot N Cold, Roar, Firework: Remixes, I Kissed a Girl and Last Friday Night (T.G.I.F.).
  • Last Friday Night (T.G.I.F.)
    Last Friday Night (T.G.I.F.)
    Last Friday Night (T.G.I.F.)

  • Last Friday Night (T.G.I.F.)
    Last Friday Night (T.G.I.F.)
    Last Friday Night (T.G.I.F.)

  • California Gurls: The Remixes
    California Gurls: The Remixes
    California Gurls: The Remixes

  • UR So Gay
    UR So Gay
    UR So Gay

  • Ur So Gay
    Ur So Gay
    Ur So Gay

  • E.T.
    E.T.
    E.T.

  • Thinking of You
    Thinking of You
    Thinking of You

  • Part of Me
    Part of Me
    Part of Me

  • Waking Up in Vegas
    Waking Up in Vegas
    Waking Up in Vegas

  • Circle the Drain
    Circle the Drain
    Circle the Drain