We all know that Madonna works out religously but we didn’t know, and frankly are a little disappointed to learn, that she likes to work out to Britney Spears’ new album.

“I actually love Britney Spears’s new album,” she told New York’s Z100-FM Thursday. “I usually work out to her record. I do a combination of pilates and dance aerobics.“

Madge also talked about giving Brit’s ex-Justin Timberlake a shot of B-12 while they were collaborating on her new album, Hard Candy.

“The reason I gave him a B-12 [shot] is because we only had a certain amount of days in the studio and I didn’t want him to use that as a lame-a– excuse not to come to work,” she said. “Okay? It’s got nothing to do with butt. I promise you. Listen, I don’t need to give him a shot to see his butt. Duh.”

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