Katy Perry's Teenage Dream Covers, Glee at the Emmys, Merengue Dog and more on TWiYT #120

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Lon Harris and special guest co-host Derek Housman bring you Mike Tompkins vocal covers, Jimmy Fallon performing with the "Glee" cast, a dog that dances the merengue, Tommy Lee Jones' latest ad, drunk girls face-planting and, of course, lots and lots of delicious testicle recipes.