How many albums does Katy Perry have?

As of my knowledge cutoff in September 2021, Katy Perry has released five studio albums:

- One of the Boys (2008)

- Teenage Dream (2010)

- Prism (2013)

- Witness (2017)

- Smile (2020)

Please note that this information may be outdated as Katy Perry may have released more albums after September 2021. I recommend checking official sources for the most up-to-date information on Katy Perry's discography.