Rosie Huntington-Whiteley smoldered in a backless black leather Marios Schwab dress at the "Transformers: Dark of the Moon" press conference at the St. Regis Hotel on July 16, 2011 in Osaka, Japan. After dazzling the Chinese in white lace, the 24-year-old British model tormented her Japanese fans in a black lace trimmed number from the designer's Spring/Summer 2011 Ready-to-Wear collection. 
The short belted sheath dress with a scoop neckline had a strap running down the middle of the bare back.
She accessorized with Christian Louboutin pumps, gold hoop earrings and twin heart ear studs.
She wore her golden glossy hair down, styled in large face framing waves. Mauve lipstick, shimmering golden eye shadow, thick liquid liner on lids and eye lash extensions rounded her luscious look. 
She was accompanied to the event by co-star Shia LaBeouf and director Michael Bay; the three chatted with media and answered questions about the film that has already grossed $700 million worldwide.
In the evening, the trio attended the film's premiere.
The film will open in Japan on July 29.
This is Rosie's last international stop to plug her debut film.