Taylor Swift was determined to get a solid workout in on Saturday, but anyone who passed her on the trail no doubt thought she needed a sandwich - not a sweat session.
The 23-year-old pop star revealed her slender arms and legs while she hiked with friend Ed Sheeran and her bodyguard at Franklin Canyon in Los Angeles.
Dressed in a black tank top and tiny shorts, Swift revealed that she really couldn't afford to lose any more weight while on the challenging trek.
At 5ft 9in, Swift strode confidently ahead of the pack thanks to her agile, long limbs, leaving her hiking partners in her wake.
With black Ray Ban sunglasses keeping out the sun and her blonde hair pulled back in a ponytail, the You Belong To Me singer was happy to get an open air sweat session in sunny California while the rest of the country was shivering.
Poor Ed, 22, trailed behind the country star, no doubt worrying about his pale, English skin getting burned by the unseasonably bright rays.