The global pop star, who enjoyed huge hits such as 'Angels' and 'Let Me Entertain You, was named as Vale's new club president this week.
As a result, he was in attendance at Vale Park to soak up their League One clash with Portsmouth, a match that they went on to lose 1-0 thanks to a late Colby Bishop effort.
The match was marred by a Port Vale supporter storming the pitch and chasing the referee, but that didn't stop Williams from enjoying himself in his private box as he watched on keenly, while appearing to chant and sing along with the home supporters in attendance.
The 49-year-old is far from a stuffy, corporate head and so fans can probably expect similar animated displays at matches that he attends in future.
After all, he is the man who referred to himself as 'El Presidente' in his unveiling interview.
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Speaking to Port Vale's media channels, he said: "My life is bizarre and wonderful and has taken many turns and twists and to find myself from the Railway Paddock to be 'El Presidente' is pretty special.
"It feels as though I need to be doing more in and around this place."
Williams added: "Football clubs are run by people with certain characters.
"The reason why I hadn't come back up to Port Vale in the longest time, was I never met the characters that ran the place. The club hadn't felt loving, homely or welcoming.
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"Then Carol and her family came in, revitalised, changed the place and I noticed this happening from afar and thought that's incredibly interesting.
"And it sort of got me to reinvest, first interest and then - meeting the family and coming and seeing what was going on - investing my heart back into the club.
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"Let the good times roll," he added.
Port Vale undoubtedly need to 'Feel' victory once again with defeat to Portsmouth leaving them in 20th spot in League One.