Bono outside Granja do Torto where he had barbecue with Brazil's President in 2006.
Bono has donated one of his hats to be auctioned by a Sao Paulo based charity who teach Paraisopolis slum children how to read.
Celebrities hair dresser Wanderley Nunes runs the project and met Bono during his visit to Brasilia in 2006.
According to Kiss FM Bono wrote Love and Pizza on the hat. When corruption is investigated and no one is found responsible, which is very often the case in Brazil, it is said "It ended in pizza".
Tough it cannot be said that Bono had this in mind when he signed the hat as he paid Brasilia a visit after an invitation by President Lula, who was accused of being aware if not directly involved in the bribery scheme called mensalão the year before his visit.
The auction will take place in August and it is believed the minimum bid will be €8,000.