To celebrate "Young Sherlock," we had Hero Fiennes Tiffin, Dónal Finn, and Zine Tseng swing by and try American fast food they have never had before, including Carvel's iconic Fudgie the Whale cake. It's so delightfully chaotic. Watch it all now on BuzzFeed Celeb YouTube! #YoungSherlock #HeroFiennesTiffin #BajaBlast #TacoBell #BuzzBites