YouTube is full of novelty performers covering well-known hits in wry fashion, but James Hill’s version of “Billie Jean” just might outpace them all. With the bass line looped and a drum beat running, Hill speak-sings the song while strumming . . . a ukulele! Hill headlines the weekend-long Wine Country Ukulele Festival with his ear-catching versions of “Flight of the Bumblebee,” “One Note Samba” and the world-famous “Super Mario Bros. Theme” on Friday, Sept. 9, at the Napa Valley Opera House. 1030 Main St., Napa. 8pm. $25–$50. 707.226.7372.