After crooning alongside the duo to the rocker's "Livin' On a Prayer" at the Winter White Gala at Kensington Palace in London Tuesday, the Duke of Cambridge headed to St. Basils, which works to prevent youth homeleness, meeting up with its staff and residents.
While there, the prince toured the facilities and learned what it's like to work with the City of Birmingham and Centrepoint, of which he is a patron on the End Youth Homelessness Alliance.
Next, the royal headed over to the Library of Birmingham to take part in a children's reading group and meet some of the young entrepreneurs who use the library's facilities.
According to Hello Magazine, the new dad gushed about his four-month-old son George during the reading, reportedly telling the group his little one has "very chubby cheeks" and "likes looking at picture books."
And as for his rock star performance Tuesday, the prince added, "I'm not doing that again."
Prince William's day wasn't done just yet though when he left the library.
For his last engagement, he visited the Summerfield Community Centre and South and City College Birmingham to meet with community representatives and families affected by the 2011 deadly riots in Birmingham.
Prince William is next scheduled to head to the U.K. premiere of Mandela: Long Walk to Freedom with his wife Kate Middleton.