Updated

Beyonce’s Super Bowl outfit designer told ET Online the pop superstar was “shrinking constantly” as she prepped for the show, meaning a lot of altering had to be done to her costume for the show.

"…She was losing weight every day," fashion designer Rubin Singer told ET. "So we had to keep taking it in and taking it in and taking it in and doing tweaks and changes."

Click here for more on Beyonce’s rehearsal work out- ET Online

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