DeGeneres proved to be the troublemaker, egging Brit on to make some questionable decisions during their trip.
“You need to take advantage of your celebrity,” DeGeneres joked at the start of their shopping trip, while urging Spears to run a stop sign and create her own parking space.
During the rest of their mall escapade, Ellen and Britney make plenty of trouble, from running up the down escalator to shopping with a “100 percent discount” and treating themselves to everything from a purse to ice cream, while being encouraged by employees and bystanders.
The clip ends with the two wacky blondes climbing into a bed display in a department store to take a nap.
Watch the full clip below.