The Barcelona and Argentina star surprised needy kids by appearing via video link to make a monster donation
The 28-year-old playmaker surprised attendees at the 'Un Sol Para Los Chicos' campaign - similar to Children In Need - by appearing from Barcelona to send his best wishes, and presented a cheque for AR$4,500,000 (£315,000).
Messi is preparing for the season-opening Supercopa de EspaƱa against Athletic Club, and although he has been strongly criticised in his homeland for Argentina's failure to win either of the major finals they have appeared in over the last year, his generous charity gesture will have been seen around the country by over five million people.
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Messi netted only once in six games during the Copa America this summer, and was powerless to stop them losing in the final to host nation Chile just 12 months after they had fallen short in the World Cup final against the Germans.
He was criticised by his compatriots for his perceived under-performance throughout the competition, and was expected to sit out the friendly with Mexico in Dallas scheduled for September 8.