Panic! At The Disco and Weezer are doing their bit to help those affected by Saturday night's (11Jun16) nightclub massacre in Orlando, Florida, by staging a blood drive at their Miami show on Tuesday night (14Jun16).
The Florida-based blood centre OneBlood will be collecting donations at the bands' sold out concert at the Bayfront Park Amphitheater.
Fans hoping to give blood during the four-hour drive must be at least 16, "weigh 110 pounds and be sober while donating".
Those who are 16 will need a parent's presence or written consent.
A gunman opened fire in packed Orlando club Pulse on Saturday night, killing 49 people and injuring 53 more before being killed during a shootout with police officers.
The attack is the worst mass shooting in U.S. history.