WATCH: Jennifer Lopez Shakes It For Disaster Relief

JLO helped kick off the L.A. portion of benefit concert One Voice: SOMOS Live on Saturday night by shaking her booty (for a lengthy 13 seconds).

The live-stream event was broadcast from both L.A. and Miami, and was organized to help raise money for disaster relief for those affected in Puerto Rico, Mexico, the Caribbean and Florida.

Performances of the evening included Lopez, Mary J. Blige, Jamie Foxx, Bruno Mars, Marc Anthony, DJ Khaled, Selena Gomez and more while other celebrities like Debra Messing, Kim Kardashian and Ellen Degeneres worked the phones for donations.

Watch JLO's performance of "Let's Get Loud", full coverage of the event, as well as Bruno Mars' heartfelt spanish rendition of "Just The Way You Are" below: