Calling into to his KIIS-FM radio show Thursday morning, the 23-year old singer giggled when Seacrest brought up her impressive ring from fiancé Pete Wentz, 28. "It is [huge]!" Simpson said from her mother's New York City hotel room, "I stare at it. I'm like, 'Oh, my god, I can't believe this is on [my] hand!'"
Simpson was more coy about other details of their recent engagement to the Fall Out Boy bassist. "I'm keeping that part sacred," she said of Wentz's actual proposal. "But I will tell you it was very thoughtful and he did a great job."
Pushed on whether she was planning on drinking alcohol Thursday night, Simpson stayed mum on her pregnancy, playfully answering, "Who knows. Maybe."
Still, Simpson couldn't contain her happiness. Despite the name of her upcoming album – Bittersweet World, out April 22 – she said she was "extremely in love making the record."
Rapper Nas called the newly engaged couple "super people" and shared his recipe for rock star marital bliss with PEOPLE at a Belvedere vodka event. "Respect each person's individuality," said Nas, who has his own high-profile musical marriage with R&B singer Kelis. "Don't try to hog somebody or handcuff 'em. Help them grow and blossom."
WITH ADDITIONAL REPORTING BY LESLEY MESSER