Leonardo da Vinci's Mona Lisa is a celebrity. She only gained that status during the last 100 years or so, which it is remarkable. Paris Hilton won't last that long (luckily).
I like the new location and the lighter colored wall much better. It is intriguing why this particular painting is so popular. Marketing is to a large degree responsible, because the painting is not particularly different in quality from the other paintings by this artist in the Louvre. My personal favorite is his lesser known portrait of St. John the Baptist (bottom picture)