Jason “Gummi Bear” Davis celebrated his release from rehab for heroin addiction by asking longtime girlfriend Michelle Haugo to marry him. The grandson of billionaire Marvin Davis — who owned 20th Century Fox and the Denver Broncos — just completed 30 days at Cirque Lodge rehab in Utah. Davis was forced into rehab after his mother, Nancy Davis, cut off his trust fund and refused to pay his rent. On his first day of freedom Tuesday, he popped the question to Haugo while dining at the Ivy in Beverly Hills. Davis’ rep, Brian Quintana, told us: “Jason has been clean for a month and celebrated by asking Michelle to marry him. He proposed with a diamond ring from his grandmother, Barbara. He has asked his old friends Paris and Nicky Hilton to be bridesmaids.” Before he goes up the aisle, Davis has agreed to appear on VH1’s “Celebrity Rehab” along with Tila Tequila and Jason Wahler.