In case you missed the live press conference announcing her Las Vegas residency, the Taylor Swift Thelma & Louise-inspired CMT Awards spot, or new single "Today Is Your Day," Shania Twain is making a comeback, y'all. After a public divorce and years of prolonged vocal problems, Twain wants to make sure you know that she's really over it all, and proving so by performing a duet with everyone's favorite party starter-cum-inspirational leader, Lionel Richie. The two team up on "Endless Love" in a promo for Sunday's finale Twain's OWN docu-series Why Not? (which will include her wedding to Frédéric Thiébaud and thus explains the song choice). It's shot in what appears to be a very intimate recording studio—there's a bed in case someone gets tired? (Our money's on Lionel)—and Twain and Richie trade off exuberant verses, topping each other with triumphant hand gestures and even bigger bouts of air guitar. Don't you feel inspired? Let's go out there and conquer the world! Or, at least our walk home tonight. Nice hat, Mr. Richie. Is that House of Harlow?