Musical theater living legend Patti LuPone has been surprising audiences on her current tour by singing “I Wanna Be a Cowboy’s Sweetheart.” The 1935 Patsy Montana country-and-western song is not the Tony/Olivier/Grammy-winner’s standard Broadway and jazz fare. Now we know where the addition to her repertoire came from! LuPone belts out the ditty in a spectacular show-stopping song and dance number in Palm Royale, the delightfully twisted drama about Palm Beach socialites from executive producer Abe Silvia. LuPone guest stars as the town’s (maybe the nation’s) richest resident, bold and brash real-life socialite/businesswoman Marjorie Merriweather Post, who sings the song to entertain guests at…
