We've dissected seven of the actress's recent looks to see what makes them tick. Consider it a master class in the art of blazer-wearing. And don't forget to click through to the end of the slideshow to shop a roundup of covetable pieces.
Tip: Who says blazers can't be black tie? Pair a tailored cream jacket with a black top and pants for an inverted take on the the classic tuxedo.
On Alba: Narcisco Rodriguez tuxedo jacket, top, and pants; Giuseppe Zanotti shoes.
Tip: White tee and jeans? Meh. White tee, jeans, and a pretty floral blazer? Now we're talking.
Photo:Stefanie Keenan/Getty Images for CB2
Tip: Offset the pouf of a full skirt with the clean lines of a structured jacket.
On Alba: Carolina Herrera skirt; Brian Atwood Temptation Sandals ($875).
Photo:Kevin Winter/Getty Images
Tip: Too modest to try a crop top by it's lonesome? Keep it company with a sleek black blazer. It's a match made in trend heaven.
On Alba: Louis Vuitton embellished pumps.
Photo:All Access Photo / Splash News
Tip: Hop on the borrow-from-the-boys bandwagon with an oversized blazer in business suit gray.
Photo:VLUV / Splash News
Tip: Embellished or lace sleeves take the look into cocktail party territory.
On Alba: Lovers + Friends Desert Moon Lace Blazer ($198).
Tip: Style colorful pieces that play off each other but don't feel too matchy-matchy.
Kiss The Glass Blazer ($198) in Shattered Glass Print
Checked Blazer ($90) in Blue
Contrast Shawl Lapel Jacket ($1,075)
Zip Front Short Tyler Jacket ($465) in Navy
Lanai Jacket ($395)
Floral Print Blazer ($100)
Three Pocket Blazer ($98) in Rose-Dust
Lawrie Blazer ($795)
Rylan Blazer in Gilded Paisley Jacquard ($298) in Black Shimmer