According to Musiqueradio.com Esmée will be performing with Enrique Iglesias in France on March 4th 2009. Thanks Cousin Vinnie for letting us know!
With some help of Mo I translated the article into Engish because it’s a France website:
Enrique Iglesias will perform an unique concert in France, he will be performing in at the Zenith Arena in Paris on May 4th (2009). And for the first part of the concert of the Spanish singer he will be supported by the dutch singer Esmée Denters, the first signed of Justin Timberlake’s, assistant of T.I., on his own label Tenman Records.
Esmée Denters is 20 years old and a Dutch Singer, she didn’t imagine that she would be performe tree years ago. In 2006 she posted videos of her online, videos of her singing songs of Rihanna, Alicia Keys or Christina Aguilera. In only a few months, the incredible talent, interpertation, and the exceptional voice of Esmée Denters allured the whole world.
The views of the videos she posted online grew at incredible speed. In one year, it is more than sixty million people who precipitated to listen and look with much interest in these cover videos of Esmée Denters. The incredible buzz around Esmée brought her to the ears of Justin Timberlake, who immediately fell under his charm and thus made d’ it first signature of its own label Tenman Records in 2007.
Esmée Denters has already recorded an original title with the profit of the fight against poverty throughout the world, for the charity “International Oxfam”. Esmee Denters is currently in studio and prepares her very first album. Released for spring 2009 in France, and this under the benevolent eye of Justin Timberlake.
Source
It looks like Esmée will be in the pre-show for Enrique Iglesias in France. I don’t now if this news is true but according to Enrique Iglesias official website he will be performing on May 4 in France.
Esmée Denters, a dutch 23 year old singer/songwriter, discovered - as one of the first - throughout 
