Here's something you don't read in many K-pop reviews--the IU song "Love of B" from the singer's new Album "Modern Times," swings, I mean really swings.

It's a feat that is made all the more impressive by the fact that there isn't a drummer on "Love of B," just guitar, upright bass and the sultry sound of IU's vocals.

Guitarist Park Ju Won shows off some impressive jazz chops, as he dials in the sound of icon of the French Gypsy musical legacy, Django Reinhardt, with ease.

Most Woody Allen fans are probably well acquainted with the signature sound of Reinhardt. In addition to be included on the soundtrack for Allen's 1980 film "Stardust Memories," the guitarist was a centerpiece of 1999's "Sweet and Lowdown."

Mining Django Reinhardt riffs is obviously miles away from anything anyone on the K-pop charts is doing right now, but the sound on "Love of B" doesn't come off as forced or gimmicky.

Of all the jazz, folk and samba sounds IU is experimenting with on "Modern Times," this one does seem to suit her best.

Her voice is smooth but sold. Her delivery is laid back but she retains the confident delivery of a 1940s torch singer.

High quality jazz singing is not an easy thing to deliver. One miscalculation and the results can quite easily be terrible.

Of the mountain of jazz vocal records made, it is a select few giants like Billie Holiday, Nina Simone or Ella Fitzgerald whose albums still stand the test of time.

Not to cast IU in with such a list of legends at a stage so early in her career, but there are jazz vocalists that have devoted their lives to singing in the idiom that don't produce a sound nearly as appealing as Park and IU do here.

Not bad for just one of the many musical directions IU fools around with on "Modern Times."

"Love of B" demonstrates a sound that would be fertile ground for the singer, if she decided to expand the concept by doing an album of big band jazz, for example.

But for an artist with what seems to be a restless spirit (as all the best ones have) it seems doubtful IU would go that strongly in any one direction anytime soon.

Listen to "Love of B" off of the new IU album "Modern Times" RIGHT HERE