"This year we are anxious to see Mariah come back," the "Live with Kelly" host told E! News.
Seacrest, 43, said on "Good Morning America" earlier this week that Carey is set to perform her 1993 hit song, "Hero," along with other hits on "Dick Clark's New Year's Rockin' Eve with Ryan Seacrest" on ABC.
Her appearance comes exactly one year after a performance on the show that she said left her "mortified."
Carey, 47, successfully opened last year's set with a rendition of the New Year's classic "Auld Lang Syne," but while she was performing her 1991 hit single "Emotions," she abruptly stopped singing, though her dancers continued performing behind her.
"We can't hear," Carey told the crowd in Times Square, trying to continue. "We didn't have a sound check, but it's New Year's, baby. It's OK, guys."
Refusing to sing the song, she said, "I'm trying to be a good sport here."
The TV host admitted that it wasn't his idea to have Carey return, but called it "a good idea." Seacrest continued, "I think people are excited to see her back. People love her. She’s beloved."