'Changes' by Tupac Shakur - Originally recorded in 1992, 'Changes' features in Tupac's 'Greatest Hits' compilation released posthumously, but it was never included in an album.
'Focus' by Ariana Grande - 'Focus' isn't included in the original release of Ariana Grande's third studio album, 'Dangerous Woman.'
'I Love It' and 'FourFiveSeconds' by Kanye West - The song 'I Love It' featuring rapper Lil Pump never made it onto a Kayne West album.
'T.H.E. (The Hardest Ever)' by will.i.am - This tune, featuring Mick Jagger of The Rolling Stones and Jennifer Lopez, was never included in an album.
'Timebomb' by Kylie Minogue - Kylie Minogue's hit 'Timebomb' was released in 2012 as a single and not included in an album, other than compilations and box sets.
'Gambler' by Madonna - 'Gambler' is part of the soundtrack of the 1985 movie 'Vision Quest.' It was never included in any of Madonna's albums.
'20th Century Boy' by T. Rex - This huge hit by British Glam rockers T. Rex was not included in the 1973 album 'Tanx'.
'This Groove' by Victoria Beckham - Released as a single in 2003, 'This Groove' was originally recorded for Victoria Beckham's second studio album, which was never released.
'Stay Together' by Suede - Released in 1994, just before their second album came out, 'Stay Together' was never included in a Suede album.
'The Only One I Know' by The Charlatans - This song was eventually added to the reissue of their 1990 album 'Some Friendly,' but it was not included in the original version.