What instruments does Katy perry use in her video of roar thank God Friday ET by the grace unconditionally legendary lovers waking up Vegas hot n cold and firework?

The instruments used by Katy Perry in the music videos mentioned may vary. Here's a general overview of the instruments commonly featured in these music videos:

"Roar":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

- Keyboard

"Thank God It's Friday":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

"E.T.":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

- Keyboard

"By the Grace of God":

- Piano

- Guitars (both electric and acoustic)

- Drums

- Bass Guitar

- Synthesizers

"Unconditionally":

- Piano

- Acoustic Guitar

- Drums

- Bass Guitar

- Synthesizers

"Legendary Lovers":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

- Keyboard

"Waking Up in Vegas":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

"Hot n Cold":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

"Firework":

- Electric Guitar

- Drums

- Bass Guitar

- Synthesizers

- Piano

It's worth noting that Katy Perry's music often features a mix of electronic and live instrumentation, and additional instruments may have been used in these music videos.