Besties and workout buddies! Taylor Swift and Selena Gomez went without makeup for what appeared to be a fierce gym session in West Hollywood on Monday, January 18.

PHOTOS: Taylor Swift’s celebrity BFFs

The “Out of the Woods” singer, 26, and the “Hands to Myself” songstress, 23, kept things casual in their workout ensembles. While Swift sported a black hoodie, Superdry Gym Running Capri Leggings and Nike sneakers, Gomez flaunted her fit frame in a pink Hurley sports bra with printed pants.

Swift, however, did add one luxe accessory: her beloved, black Prada tote, which she swung from one arm.

A source tells Us that the longtime BFFs — who met back in the mid-2000s, when their careers were just starting to take off — worked up a sweat for about two hours inside Simone De La Rue’s Body by Simone L.A. studio.

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PHOTOS: More Stars Without Makeup!

The pair have been spending a lot of quality time together lately, and even recreated Swift’s “Out of the Woods” music video via Instagram. Sharing photos of themselves hiding and laughing in a group of trees, the ladies captioned the snaps with Swift’s lyrics. “Are we out of the woods yet?” the country-turned-pop beauty wrote, and Gomez added, “Are we in the clear yet?”

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