John Mulaney and Olivia Munn's baby news!

Jenna Bush Hager covers the latest buzzy topics, trends and pop culture news. Today, we dive into John Mulaney's news that he is expecting a baby with girlfriend Olivia Munn. Plus, the 3rd Hour crew chats 25 years of "Blue's Clues," and Jenna reveals her latest book club pick.

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