Beyoncé fought off sleep as she shot the classy, yet seductive video for “Dance for You,” included on her Live at Roseland: Elements of 4 DVD. The pop superstar channeled screen siren Marlene Dietrich in the film noir-inspired visuals, helmed by director Alan Ferguson, who dates her sister Solange.

“‘Dance for You’ is about giving yourself fully to one person, it’s about being able to lose control with the person you’re meant for,” said an exhausted B. “Both the melody and the lyrics make it one of my most intimate songs, so I wanted the video to have the same rawness.”

The pregnant singer also joked about her food cravings in a sit-down interview with Katie Couric, airing Friday on ABC’s “20/20.” Get a sneak peek below.