Born on Nov 25, 1960 in Augusta, GA, Amy Grant started with contemporary Christian music (CCM) style of gospel music, she did the most to popularize it in the 1970s and 1980s before successfully crossing over to pop music in the '80s and early '90s.

She achieved this breakthrough for CCM and for herself by forging a pop/rock sound that matched the production values, and often aped the styles, of pop/rock, and by writing lyrics that often were ambiguous in their meaning, sounding to Christian music fans like appeals to God and to more general pop fans like love songs. She also matched the staging of rock concerts in her shows, which often played in venues more typical of secular performances than religious ones. And her music videos, which emphasized her photogenic appearance, were on a par with those of pop stars. When it occurred, her complete crossover to pop was more a slight shift of emphasis than a major change of direction. Nevertheless, it made her a controversial figure in the Christian music community of the '80s in a way similar to Bob Dylan in the folk music of the 1960s: she was both the field's biggest star and came to be viewed as something of a traitor. As her career went on, however, she managed to mend fences with traditional fans and achieve a balance of pop and Christian-oriented songs on her albums as her career became less of a full-time focus for her and her record sales declined from the heights of her pop heyday.
(Above quoted from the Internet)

If one defines "success" as obtaining a glamorous popularity, this is a good example that one cannot succeed in a narrow cage of gospel singing. One has to appeal to the broad audiences as she did.
After all, her beauty and voice were given by her God. Why not fulfill it to all of his sons and daughters regardless of their religion?
I think Amy's way is truly serving the humanity rather than to be a hidden singing nun in a Christian monastery.  - WM

In case YouTube fails to respond:
C:/users/steven/My Music/Amy Grant - I Will Remember You.mp3
(6,052KB, 128kbps)
C:/users/steven/My Music/Amy Grant - I Will Remember You (small).mp3
(1,196KB, 32kbps)