I am coveting Sienna Miller's retro glam look at the Los Angeles premiere of her film "G.I. Joe: The Rise of Cobra . She totally rocked the whole Veronica Lake/Old Hollywood vibe.How can you get the same makeup look yourself for less? COVERGIRL Celebrity Makeup Artist Molly Stern, who has worked with Leighton Meester, Ellen DeGeneres and Amy Adams, reveals how to recreate Sienna's look for under $50.