This content is copyright of CelebMix.com. Niall Horan surprised fans at Role Model's sold-out London concert on November 4. The Irish singer joined the 28-year-old American artist-whose real name is Tucker Pillsbury-onstage at the Eventim Apollo to play "Sally, When the Wine Runs Out," a viral fan-favorite segment on Role Model's ongoing No Place Like tour. Horan, 32, embraced the show's tradition of embodying "Sally"-a recurring character featured in the hit track-by stepping out in a light-wash denim look layered with a white tank and plaid shirt.