In 1979, Ross released "The Boss", continuing her popularity with dance audiences, as the title song became a number-one dance single. On July 16, 1979, Ross guest-hosted an episode of Johnny Carson's "The Tonight Show", featuring Lynda Carter, George Carlin, and Muhammad Ali as guests. Later that year, Ross hosted the HBO special, "Standing Room Only", filmed at Caesar's Palace's Circus Maximus Theater in Las Vegas, Nevada, during her "Tour '79" concert tour. This concert special is noted for its opening, during which Ross literally makes her entrance through a movie screen. In November of that year, Ross performed "The Boss" album's title track as a featured artist during the Macy's Thanksgiving Day Parade, in New York City.