When 3LAU isn't busy taking over the main stage at music festivals, 3LAU can be quite the humble guy.

After visiting a school in Guatemala back in the day, Justin ‘3LAU' Blau decided to partner with the charity Pencils of Promise. Through his record label, BLUME, 3LAU was able to help raise an incredible $200,000. Since hitting that goal, 3LAU continues to fundraise through multiple venues to further help in social giving.

For 3LAU's latest good deed, the DJ and producer decided to play piano for his sister's wedding. Watch him take over a much smaller crowd for this incredible moment.