Sienna Miller has been crisscrossing the globe this past week, promoting her upcoming film "G.I. Joe" in Australia, Japan, Germany, and England. While we don't agree with all of her life decisions, specifically all that traipsing around topless with a married man, we can get behind her clothing choices. Lately, she's ditched her usual boho style in favor of tailored pants and oversized gray tank tops. There's little chance we'll watch "G.I. Joe," but you'll definitely see us copping outfits that look awfully similar to Sienna's.