Britney Spears is the ultimate Tori Spelling fan.

Who knew?

Like Tori, Britney knows what it’s like to raise two young children under the glare of Hollywood’s watchful eyes. That’s why she’s taking a few tips from the Oxygen star’s recently-released memoir on parenting, titled Mommywood. The book’s won such rave reviews from Britney, the “Gimme More” vocalist requested an autographed copy for her collection — a move that’s left Tori “really flattered,” says one Star insider.

Star Magazine reports: “Britney’s actually a huge fan. She used to be obsessed with watching Beverly Hills, 90210 back in the day, and now she thinks that Tori has such a cute family.”