Although the Rolling Stones' 1967 psychedelic opus 'Their Satanic Majesties Request' was a polarizing LP, the genius of 'She's A Rainbow' is inarguable.

Strings arranged by Led Zeppelin's John Paul Jones, a chorus of raining horns and music-box-like piano pirouettes from long-time collaborator Nicky Hopkins give the song a fanciful bent.

Still, there's an underlying sadness to the song—namely, “ooh-la-la” backing harmonies and the blurting shards of strings near the end -- which elevates it beyond mere psychedelic whimsy.

That the song isn't all sunshine and flowers makes it endure. Just last month, members of Arcade Fire performed 'She's A Rainbow' as a farewell to 'Saturday Night Live' cast member Kristen Wiig.

Watch the Rolling Stones Perform 'She's a Rainbow'