Jessica Alba, Gavin Rossdale and Nicole Richie get drenched as they take the ALS Ice Bucket Challenge. Pic: Instagram
Gwen Stefani prepared to dump a bucket of ice cold water over her husband and friends. Pic: Instagram
Jessica Alba Pic: Instagram
Jessica, Gavin and Nicole get prepared for the soaking. Pic: Instagram
Taylor and Jaime poured their buckets of water over each other. Pic: Instagram
Justin Bieber Pic: Instagram
Selena Gomez Pic: Instagram