Mary J. Blige may be a New Yorker, but her World Series look was tailor made in Boston

Bronx native and New York Yankee fan Mary J. Blige sang the National Anthem at Fenway Park last night, taking the field before Game 1 wearing an official powder blue World Series jacket.

But those things tend to run on the baggy side, so Blige went to the Back Bay and got hooked up by one of Boston’s most renowned luxury tailors. Alan Rouleau, of Alan Rouleau Couture at 85 Newbury St., #3, customized Blige’s jacket just hours before the Sox took on the St. Louis Cardinals.

We’re told Rouleau shortened the bomber-style jacket by six inches, and cropped and trimmed more than five inches on the sides, armhole, and full length on the sleeves. Additionally, Rouleau closed the pockets and shortened the zipper for a more fitted look.

Check out Blige’s top-shelf a cappella performance up above, as well as two behind-the-scenes looks at Rouleau and the Grammy-winning singer at the tailor’s boutique.

On deck for tonight’s game? Coincidentally, it’s James Taylor.

RELATED: Who would you like to see sing the National Anthem at Fenway?, October 22, 2013

Photos courtesy of Alan Rouleau Couture

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