Kate Hudson Keeping Derek Hough As Her “Booty Call,” Shows Off Her Bum In Barely-There Dress!

Kate Hudson’s sexy streak is continuing after she sported yet another dress that left little to the imagination at the Versace Fashion Show in Paris. But is her new confidence as a single gal all thanks to her new “booty call,” Derek Hough?

Hudson, 35, and the 29-year-old Dancing With The Stars host have kept their secret romance hush hush since they began dating in December following her split from Matthew Bellamy. And while they’re doing a good job keeping the details under wraps, a source told OKMagazine.com exclusively that they’re definitely still hooking up!

The insider told OK! that their most recent fling was after Harvey Weinstein’s Globes party, when Kate wore that barely there white dress! (It’s no surprise—Jennifer Aniston couldn’t even keep her hands off Kate’s tush during an interview!)

“They arrived and left separately but they met up afterwards at a hotel for an undercover booty call,” the source said.

“Kate doesn’t want to be tied to another guy so soon after she and Matt split, so she’s trying to keep this thing with Derek under wraps,” the insider said. “Problem is, he’s her number one booty call and she can’t resist him.”

There may be some hope for the new couple, the insider revealed, if Kate decides to make it official once her divorce from Bellamy is finalized.