Ivo Dimchev’s Web site calls him a “physical theatre artist” but it could just as easily have said queer performance artist or birthday singer or Bulgarian pop star with millions of views on YouTube, or all of the above, piled on top of one another and taking turns losing their grip. This restless, prolific artist trained in Grotowski’s stripped-down Poor Theatre, where the voice is conceived as another body part and every part is a live wire. Dimchev began on the performance art circuit before he turned to crafting and performing songs for a suddenly huge audience. Hilarious, alarming, and cause for light anguish, both the shows and the songs upend whatever expectations you thought they depended on—genre, the performer’s gender, or even that his basic physique won’t shift before your eyes. Meanwhile our own skin loosens. For this two-week gig at La Mama, titled In Hell with Jesus/Top 40, Dimchev plays the host of a musical-in-the-making whose characters are likely to include us. —Apollinaire Scherr