1 | Circle the Drain- recording engineer:
- Nick Chahwala (bass, guitar)
- drums (drum set) programming:
- C. "Tricky" Stewart and Pat Thrall
- sound engineer:
- Andrew Wuepper
- additional engineer:
- Pat Thrall
- assistant engineer:
- Kory Aaron, Steven Dennis , Nicolas Essig, Mark Gray , Travis Harrington, Charles Malone , Luis Navarro , Justin Roberts and Randy Urbanski
- engineer:
- Nick Chahwala (bass, guitar), Steve Churchyard (drums (drum set)), Chris “Tek” O’Ryan, Brian “B‐Luv” Thomas and Andrew Wuepper
- producer:
- C. "Tricky" Stewart and Kuk Harrell
- assistant mixer:
- Giancarlo Lino
- mixer:
- Jaycen-Joshua
- bass:
- Daniel Silvestri
- drums (drum set):
- Josh Freese
- guitar:
- Charles Malone , Julio Miranda and Daniel Silvestri
- vocals:
- Katy Perry
- phonographic copyright (℗) by:
- Capitol Records, LLC (in 2012)
- recorded at:
- Henson Recording Studios in Hollywood, Los Angeles, California, United States, Silent Sound Studios in Atlanta, Georgia, United States, Studio at the Palms in Paradise, Nevada, United States, The Boom Boom Room in Burbank, California, United States and Triangle Sound Studios in Atlanta, Georgia, United States
- mixed at:
- Larrabee Studios in Universal City, California, United States
- recording of:
- Circle the Drain
- writer:
- Lamont Neuble, Katy Perry and Christopher Stewart
- publisher:
- OSS Music (in 2010), RZE Music Publishing (in 2010), Songs of Universal, Inc. (in 2010), Universal Music Corp. (in 2010) and When I’m Rich You’ll Be My Bitch (in 2010)
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