This lighthearted song is a riposte to the tabloids' reporting of Williams' battles with weight problems. In the middle of the singer's Take the Crown tour, a newspaper printed some really unflattering pictures of him performing.
The song includes a verse where Williams sings, operatically,
"Now you've upset me I feel like a snack. A packet of Minstrels, a pie and a nap So what's wrong with that?"
"Fat Pop Star started as a joke," co-writer Guy Chambers told The Daily Telegraph. "I came up with the chorus melody, which is very operatic, and Rob can really sing that kind of music. When we performed it for the first time the whole crowd spontaneously stood up and started clapping. It was great seeing the shock of the public following that lyric and to hear him singing like Pavarotti."