Justin Bieber may not have been born when the United States government's so-called War on Drugs began, but he's apparently hoping to be around to see the ceasefire.

"shoutout to @UncleRUSH . gotta support him to #EndTheWarOnDrugs and show that we the youth have a voice. hashtag and support the cause," the 19-year-old pop star tweeted today in support of Def Jam cofounder Russell Simmons, who posted an online letter to the Obama administration urging him to implement "more creative criminal justice reform" (etc.) when it comes to drug users.

The dozens of celebrity signees who threw their support behind Simmons' missive include Will Smith, Jon Hamm, the Kardashian sisters, Kris Jenner, Russell Brand, Susan Sarandon, Tim Robbins, Demi Moore, Mark Wahlberg, Eva Longoria, Scarlett Johansson, Woody Harrelson, Jamie Foxx, Jim Carrey and Kerry Washington.