Williams with Camilla, Gonzo, Kermit and Fozzie Bear in 2013.
Robbie Williams is a singer from the UK who first came to fame as a part of boy-group Take That.
In 2013, the Muppets appeared in several sketches with Williams for his television special One Night at the Palladium.
He also recorded a Valentine's message for Miss Piggy (orchestrated by Kermit the Frog) that was released on several of Disney's European YouTube channels on February 14, 2014.
