Kristen Bell's husband, Dax Shepard, recently celebrated 16 years of sobriety, but in a heartbreaking turn of events, he revealed he relapsed on painkillers.The actor, 45 - who has two daughters, Delta, five, and Lincoln, seven, with Kristen, 40 - even admitted he was high as he rang in the sober milestone. Talking on his podcast Armchair Expert on Friday Dax explained how his painpill-taking spiralled out of control following a motorcycle accident in the summer.MORE: Kristen Bell's children