New couple Kim Kardashian was all about sexy showing off just the right amount of cleavage and leg in a gold and white Pierre Balmain dress and a pair of calf-high black satin boots at the Cannes Film Festival on Wednesday.

Kim and new beau Kanye West were spotted leaving a private party on a yacht before attending the premiere of Kanye's new film, "Cruel Summer".

The film, which features rapper Kid Cudi, debuted under a giant pyramid-shaped tent with seven monitors screening the new film.

The New York Post's Page Six reports that the couple were "all over each other" and "making out in the corner" during the party after the viewing, according to a source.

Unfortunately for Kim, her fashion choice wasn't well researched - the dress is the same one that Victoria's Secret model Alessandra Ambrosio and actress Zoe Saldana recently wore; and it's even very similar to the one Katy Perry wore to dinner in Paris back in March. A big celebrity no-no.