Pointed this out the other day somewhere on here
and these are the first 4 that spring to mind... feel free to post others, but I'll make the poll for just these 4
(formerly "Thank You" on Dido's...album...that was...amazing)
(later "Empire State of Mind (Pt. II)" on Alicia Keys' album whose name escapes me)
(later "Love the Way You Lie (Pt. II)" on Rihanna's Loud)
(later "Read All About It (Pt. III)" on Emeli Sande's debut album)