BE WELL BABY GORILLA

Howard Stern's sidekick is finally in rehab. Artie Lange, who's long overindulged with drugs and drink, was scheduled to attend close pal Bob Saget's Comedy Central roast on Sunday night, but never made it to LA. Instead, he checked himself into an intensive outpatient rehab program. A source said Lange "felt awful for not being there for Bob, but needed to make his health a priority." Lange also canceled his stand-up shows this weekend, but plans to return to his regular gig on Stern's Sirius radio show when it returns from hiatus. Lange's rep, Lewis Kay, confirmed the news.