| Episode credited cast: |
 | Kimberley Leonard | - | Herself - Presenter |
| Rest of cast listed alphabetically: |
 | Justin Bieber | - | Himself (archive footage) |
 | The Black Eyed Peas | - | Themselves (archive footage) |
 | Miley Cyrus | - | Herself (archive footage) |
 | Ariana Grande | - | Herself (archive footage) |
 | Little Mix | - | Themselves (archive footage) |
 | Chris Martin | - | Himself (archive footage) |
 | Mike McCarthy | - | Himself - Correspondent |
 | Parrs Wood High School Harmony Choir | - | Themselves (archive footage) |
 | Katy Perry | - | Herself (archive footage) |
| Katie Spencer | - | Herself - Correspondent |
 | Pharrell Williams | - | Himself (archive footage) |
 | Robbie Williams | - | Himself (archive footage) |
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