Gene Pitney - Every Breath I Take.
This is one of Phil Spector's first hits. He apparently spent the previously unheard of sum of $14000 to record this.
Nice one by Gene from 1961.
Written by Carole King & Gerry Goffin, produced by Phil Spector Chart Peaks: Music Vendor 27, Cash Box 34, Billboard 42 CD audio, originally issued on 45rpm: ...