We just finished a full string section for one of the tunes on my CD. I decided awhile ago that I'd cover Leonard Cohen's "Hallelujah". It was originally just going to be voice and guitar. The engineer/owner said he'd pay for the string section and eat the studio time because he wanted to arrange the parts.
LOL- we ended up with 42 tracks of material. I'm tempted to post what I have because I simply can't get over how amazing it is but I think I'll wait until I get something more than a quick mix.