President Obama met Monday with celebrities who are helping him promote his signature healthcare law ahead of the October 1 launch of state insurance exchanges.

The president dropped by a White House meeting with singer Jennifer Hudson and actress Amy Poehler, as well as representatives for Oprah Winfrey, Alicia Keys, and Bon Jovi, according to CNN. 

Other attendees included officials from the Grammy awards and the Funny or Die website, which is a brainchild of actor Will Ferrell and director Adam McKay.