Ashton Kutcher Attends Bill Clinton Fundraiser Without Demi Moore

Credit: Handout/Getty Images for Control Room

Ashton Kutcher's putting on a brave face.

The 33-year-old actor arrived solo to the Hollywood Bowl on Saturday for Bill Clinton's "Decade of Difference" concert. Just two days earlier, a moving truck was spotted pulling out of the L.A-area home he shares with Demi Moore.

The couple's six-year marriage is now being put to the ultimate test in the wake of Kutcher's one-night stand with 22-year-old Sara Leal in a San Diego hotel room on Sept. 24 -- the sixth wedding anniversary of Kutcher and Moore, 48.

EXCLUSIVE VIDEO: Sara Leal speaks out about her one-night stand with Ashton

Kutcher smiled and waved to the cheering crowd before he introduced Usher's performance. He also spoke about "my DNA foundation," the joint organization he and Moore created in 2010 to help stop child sex trafficking. The Two and a Half Men star appeared to be wearing his wedding ring.