Curry joined Paramore on stage at Chase Center Monday night to sing their hit song "Misery Business."
Lead singer Hayley Williams says Curry and the band go back a few years and this was their "reunion."
She told the crowd from the moment Curry takes the mic, "This is no longer a Paramore show, this is a Steph Curry show."
The band postponed their original concert date last month because of a sickness within the touring party.