Spinal Tap frontman David St. Hubbins so wisely characterizes the artistic balancing act by saying, "It's such a fine line between stupid and clever." They Might Be Giants have made a career out of obliterating that line. Writing bizarre tales of narcotic statues, birdhouse-filled souls and toothy shoehorns, it would appear that songwriting partners John Linnell and John Flansburgh are the Lennon/McCartney of an alternate universe. Their gift is in making inescapably catchy melodies, endearingly nerdy vocals and wildly entertaining arrangements play the straight man to their nontraditional subject matter.