"[Kim] just showed Chrissy everything a mom would need at this time," Legend said of the outing.
Bringing up West's recent Twitter rant where the 38-year-old rapper claimed he was millions in debt, Kimmel inquired, "Now, you say 'took you shopping,' who paid for it? Because Kanye owes a lot of money."
"I paid for it," the 37-year-old singer chimed in. "I was like, 'Let me get this.'"
Legend also talked about living with his mother-in-law, Vilailuck Teigen, and her superstitious traditions. "We were trying to have a baby for quite a while and it took us a while to have it, and she gave us a fertility necklace," Legend said. "We had a baby not long after that."
He added, "But we had a lot of doctor help too."
Legend also admitted to Kimmel that his home is still not yet ready to welcome their little girl, but that the contractor promised to have it done a few weeks before the baby is born. The couple are moving into Rihanna's old house and revealed to ET that the singer left a few items behind.
"Rihanna, if you're watching, we have some of your mail!" Teigen joked. "You have a $19 credit towards a car purchase, I believe."