The Game has posted his bank balance on Instagram - but not to boast about his millions.
While on tour, he pledged $500,000 to help the people of Flint, Michigan who are suffering a water crisis.
He loaded a screenshot of his account to prove he had transferred the funds to Avita Water - a Michigan-based bottled water company who said they would match the amount.
The Game said his donation was, "everything I've made on tour up to this point".
Putting the balance on social media made him accountable, and he encouraged others to prove they were serious about the cause as well.
"Most celebs on here faking using the word 'pledge' in their so called donations are not fooling anyone!
"To those who think it's easy getting this water to Flint, it's not so the people who are pledging they are, show us.. We want proof!!! Stop using other's tragedies for your own celebrity gain."
The rapper called out famous names such as Madonna and Jimmy Fallon for giving $10,000 each.
"That's cute, but not nearly enough," he wrote. "So I challenge anyone else in the world to match me and donate $1,000,000 in bottled water to Flint, Michigan and we want proof, shipping order receipts, bank wire receipts, pictures etc."