Singers Idina Menzel and Julie Andrews are set to appear on Bravo's Watch What Happens Live together. The television series announced the guest appearances on the show's clubhouse on Facebook. (function(d, s, id) { var js, fjs = d.getElementsByTagName(s)[0]; if (d.getElementById(id)) return; js = d.createElement(s); js.id = id; js.src = "//connect.facebook.net/en_US/all.js#xfbml=1"; fjs.parentNode.insertBefore(js, fjs); }(document, 'script', 'facebook-jssdk')); Post by Watch What Happens Live. The two Broadway stars will be on the show, hosted by Andy Cohen, on May 1.