Featuring the vocal talents of Maggie Reilly "Moonlight Shadow" is from Mike Oldfield's 1983 Crises album, and his biggest hit single. Simply a great pop tune, it's no wonder it was such a huge success. You should also check out "Foreign Affair" from the same album, also featuring Reilly. It was mysteriously not released as a single, and as such didn't get the attention it deserves. Anyway, here's "Moonlight Shadow".
Watch and listen