She and Corden transformed into Kate Winslet and Leonardo DiCaprio for a brief spell as onlookers watched the spectacular display.
The almost 15-minute video demonstrates Dion's unabashed willingness to dive right into any kind of performance: whether it's belting a tune (her own hits or Rihanna's, for instance) at a moment's notice or offering a unique take on viral earworm Baby Shark seconds after learning it.
From there, Dion sets forth across the strip with Corden at the wheel.
Dion reluctantly revealed she had way too many, with Corden saying he'd heard she had about 10,000 pairs.
Looking panicked, Celine exclaimed: "Where do you want me to give some shoes?" "I have a place in Las Vegas ... let's call it a 'warehouse, '" Dion said, pantomiming air quotes.
Corden then pressures her to part ways with a few shoes he's tucked in the backseat. Her current Vegas show, "Celine", has been ongoing since 2011, but it is coming to an end in less than a month.
The pair also perform a full-blown Titanic tribute singing "My Heart Will Go On" in the middle of the Bellagio fountain, so buckle up.
Dion wraps up her Vegas residency in June.