Snow happy together!

Taylor Swift and Harry Styles** recently enjoyed the double date to end all double dates when they joined Swift's BFF Selena Gomez and on-again boyfriend Justin Bieber** for a little pre-Christmas ski getaway in Park City, Utah.

A source told Us Weekly that the couples stayed in separate houses at The Colony -- Swift and Styles in one, Gomez and Bieber in another -- but rendezvoused as a group at nearby Canyons Resort, where they hit the slopes for some winter fun.

Novice skiier Gomez, 20, who recently reunited with her superstar beau after breaking up with him on Halloween, took a lesson from an instructor at the lodge before joining Swift, 23, and her One Direction love, 18, on the hill. Bieber, 18, went snowboarding with his bodyguards.

Later, the "Red" singer and her boyfriend of one month shared a cozy lunch at Red Pine Lodge. They also dined with friends at Grappa, where they looked "happy and in love," an onlooker told Us.

Indeed they are. The country superstar recently joined the British boy bander in his hometown of Holmes Chapel, England, where she bonded with his big sister, Gemma, 22, at the Rising Sun pub in Bamford and gushed about how "amazing" he was.

"I can see them getting married in a week, just going for it," an insider told Us of the hot-and-heavy twosome.

This article originally appeared on Usmagazine.com: Taylor Swift, Harry Styles, Selena Gomez, Justin Bieber Go on Ski Trip in Utah: All the Details