| recordings |
|---|
| 1999-02-28 | This Time I Know It’s for Real | live | Donna Summer | 3:12 |
| 2006 | This Time I Know It's for Real (extended remix) | cover | Young Divas | 6:31 |
| 2006 | This Time I Know It's for Real (radio edit) | cover | Young Divas | 3:40 |
| 2006 | This Time I Know It’s for Real | cover | Young Divas | 3:53 |
| This Time I Know It's for Real | cover | Kelly Llorenna | 2:50 |
| This Time I Know It's for Real | cover | Kelly Llorenna | 2:58 |
| This Time I Know It's for Real (Almighty Anthem club mix) | cover | Melanie Wilson | 7:24 |
| This Time I Know It's for Real (Almighty Anthem radio edit) | cover | Melanie Wilson | 3:36 |
| This Time I Know It's for Real (Almighty mix) | cover | Kelly Llorenna | 6:42 |
| This Time I Know It's for Real (CJ Stone mix) | cover | Kelly Llorenna | 7:10 |
| This Time I Know It's for Real (CJ Stone remix) | cover | Kelly Llorenna | 4:10 |
| This Time I Know It's for Real (Flip & Fill mix) | cover | Kelly Llorenna | 4:50 |
| This Time I Know It's for Real (KB Project mix) | cover | Kelly Llorenna | 5:04 |
| This Time I Know It's for Real (KB Project remix) | cover | Kelly Llorenna | 3:58 |
| This Time I Know It's for Real (LMC edit) | cover | Kelly Llorenna | 2:57 |
| This Time I Know It's for Real (radio edit) | cover | Kelly Llorenna | 3:11 |
| This Time I Know It's for Real (radio edit) | cover | Kelly Llorenna | 3:11 |
| This Time I Know It's for Real (Riffs & Rays mix) | cover | Kelly Llorenna | 5:57 |
| This Time I Know It's for Real (Riffs & Rays remix) | cover | Kelly Llorenna | 2:29 |
| This Time I Know It’s for Real | cover | Kelly Llorenna | 2:59 |
| This Time I Know It’s for Real | | Donna Summer | 2:12 |
| This Time I Know It’s for Real | | Donna Summer | 3:23 |
| This Time I Know It’s for Real | | Donna Summer | 7:23 |
| This Time I Know It’s for Real | | Donna Summer | 2:49 |
| This Time I Know It’s for Real | | Donna Summer | 3:41 |
| This Time I Know It’s for Real | | Donna Summer | 3:26 |
| This Time I Know It’s for Real | cover | Kelly Llorenna | 3:08 |
| This Time I Know It’s for Real | cover | Kelly Llorenna | 3:07 |
| This Time I Know It’s for Real | | Donna Summer | 2:57 |
| This Time I Know It’s for Real | | Donna Summer | 3:37 |
| This Time I Know It’s for Real (12″ extended remix) | | Donna Summer | 7:24 |
| This Time I Know It’s for Real (12″ single extended remix) | | Donna Summer | 7:24 |
| This Time I Know It’s for Real (extended remix) | | Donna Summer | 7:22 |
| This Time I Know It’s for Real (extended version) | | Donna Summer | 7:21 |
| This Time I Know It’s for Real (Flip & Fill remix) | cover | Kelly Llorenna | ?:?? |
| This Time I Know It’s for Real (instrumental) | instrumental | Donna Summer | 3:36 |
| This Time I Know It’s for Real (radio edit) | cover | Kelly Llorenna | 3:07 |
| This Time I Know It’s Real | | Donna Summer | 3:40 |
