The 20-year-old singer and talk show host pretended to kiss while unsuspecting fans went to use the restroom! They also jammed out on some instruments, wore funny masks, and tried to scare the guests.
“Hi Justin! Oh my God, thank you so much. Nice meeting you!” one girl said.
Ellen responded, “You too! Nice meeting you in the bathroom.”
Watch the hilarious video below!
Justin Bieber & Ellen DeGeneres Scare Fans in the Bathroom