KT Tunstall (photo: Ria Burman) Singer-songwriter KT Tunstall brought the giggles and the groove to Yoshi's Saturday night for a double-whammy of a show. Despite suffering from allergies, KT Tunstall delivered an entertaining set, full of humor and classic songs, such as "Suddenly I See" and "Black Horse & the Cherry Tree." Accompanied on stage with only a looping machine of sorts and her guitar, KT Tunstall filled the venue with her layered, rich-sounding creations.