Yes, she is the star of Alias. Just don't confuse her with the Blonde talking in the English accent. She's an Aussie, former Home and Away star **shudder** :?
The lingerie gag is part of the Aussie advertising campaign from last season. American woman would play over the top, and you'd see her in the black, standing seductively in the doorway. A man says no, and the scene starts again, this time in red. As she starts making out with the guy in the room, she kills him, saying "What was wrong with the black?"