DAKOTA'S ON A ROLE

Dating pop star has her feeling 50 Shades of Gay!

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MOVIE hottie Dakota Johnson is back on the dating-go-round and has hooked a ride with hunky pop star Tucker Pillsbury — aka Role Model — with insiders saying the actress is already smitten with the young stud shortly after ditching former love Chris Martin, insisting she's done with him for good!

Her new reported crush is a May-December switcheroo for the 36-year-old Fifty Shades of Grey star since the Sally, When the Wine Runs Out singer's a babyish 28 and two decades younger than her old lover Chris, the ex-hubby of Gwyneth Paltrow and frontman for the band Coldplay.