Chico whose real name is Yousseph Slimani, made the revelation on ITV's Loose Women this week.
Chico was on the show us to talk about his new song - It's England Time, a remake of his hit It's Chico Time - and revealed he went Hazelwick School at the same time as Southgate and played football together for the same team.
Chico told Loose Women: "No one had a bad word to say about him. You could see he was focussed, Football is coming home - it’s England time!"
SEE ALSO England v Denmark - LIVE: Can Crawley's Gareth Southgate lead England to Euro 2020 final? | Gareth Southgate taken on tour of his home town Crawley in aid of St Catherine's Hospice | Gareth Southgate - the pride of Sussex: The England manager's Euros 2020 so far in pictures