3. At the Cannes Film Festival premiere of "Biutiful", the blonde beauty stunned in a RM by Roland Mouret “Ephron” black jersey dress. From the designer’s Fall 2010 Collection, the anything-but-basic black number impeccably draped over her slender figure. 2. We weren’t the only ones who though Jen looked sexy! Hubby Marc Anthony couldn’t keep his hands off her.