| Artist name | Roles | Recordings |
|---|---|---|
| Katy Perry | ||
| Playing for Change | ||
| Saul Williams |
| Artist name | Roles | Recordings |
|---|---|---|
| Katy Perry | ||
| Playing for Change | ||
| Saul Williams |
| Artist name | Roles | Recordings |
|---|---|---|
| Katy Perry | violin | Legendary Lovers |
| Playing for Change | violin | Imagine |
| Saul Williams | violin | Banged and Blown Through |