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While ex Justin might've had some not-so-nice things to say about Queen B recently, Madonna only praises her!

The original pop star told New York's Z100-FM that she "actually loves Britney Spears' new album," going on to admit: "I usually work out to her record. I do a combination of pilates and dance aerobics."

Madonna also doesn't really wanna sing some of her greatest hits (like "Holiday" or "Like A Virgin") ever again... "unless somebody paid me like $30 million or something," she says.

Oh, M - such a kidder! Right?