"How old is older women, 23?" she asked Harry Styles at the top of the interview, 23-year-old Taylor Swift's rumored arm candy.
"I think I may kill myself," Walters groaned when he said yes.
Walters also pressed the boys on Niall's reputation as "the cute one," their "X Factor" journey and that time Swedish fans left nipple marks on their car.
"It's what dreams are made of," quipped Louis.
Walters also took the interview down an unexpectedly dark road, asking all of the boys if they would ever consider going solo, a la Justin Timberlake. They all said no, despite Walters' best efforts to remind them of the fates of other boy bands like 'Nsync.
"We are just having an absolutely amazing time. It'd be wrong to look at it and think 'when is this going to end?'" Louis replied.
Celebrity Couples of 2014 [PHOTOS]