WATCH: Gwyneth Paltrow's Favorite Butt Exercise

(WATCH VIDEO) Gwyneth Paltrow enthused to Conan O'Brien her new butt exercises Thursday night which led the host to try the new routine. The two also shared stories about their kids–both have 3-year-old sons. Gwyneth says son Moses loves Jay –Z and characterized him as a "sensitive thug."

Watch the butt-grabbing action here!

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