Sandra Ann Lauer, later Sandra Cretu, commonly known mononymously as Sandra, is a German pop singer who enjoyed mainstream popularity in the 1980s and early 1990s with a string of European hit singles, produced by her then-husband and musical partner, Michael Cretu, most notably "(I'll Never Be) Maria Magdalena" (1985), "In the Heat of the Night" (1985), "Everlasting Love" (1987), "Secret Land" (1988), "Hiroshima" (1990), and "Don't Be Aggressive" (1992). Her albums Into a Secret Land (1988) and Close to Seven (1992) have won Sandra high critical acclaim.

"(I'll Never Be) Maria Magdalena", also known simply as "Maria Magdalena", is a song recorded by German singer Sandra for her debut studio album The Long Play (1985). The song, written by Hubert Kemmler, Markus Löhr, Michael Cretu and Richard Palmer-James, was released as the lead single from The Long Play on 15 July 1985 by Virgin Records, and was a major chart hit in Europe, reaching number one in multiple countries. It remains Sandra's signature song.