-Christian and Satine (Ewan McGregor and Nicole Kidman) -- <i>Moulin Rouge</i>
-Landon Carter and Jamie Sullivan (Shane West and Mandy Moore) -- <I>A Walk to Remember</i>
-Luigi Mario and Princess Daisy (John Leguizamo and Samantha Mathis) -- <i>Super Mario Bros.</i>

That's all I can think of off the top of my head. =D