Peggy Lee's "Sneakin' Up On You", from her 1965 LP Pass Me By, might be the cutest stalker song ever recorded. Several versions were released in the mid-to-late sixties (including Elaine Delmar's slinky and seductive, ultra-groovy recording below), but what places Peggy Lee's version on top? Simple. She playfully incorporates cat purring into the chorus. Enough said.