Eliza Dushku

With barely a week of filming left, the "On Broadway" bunch blew off some serious steam Saturday, throwing a wild wrap party at An Tua Nua on Beacon Street.

Fresh-faced former New Kid Joey McIntyre — the lead in director Dave McLaughlin’s movie about an Irish-American playwright staging a show in the back of a pub — treated the crowd to a rousing karaoke rendering of Elton John’s "Tiny Dancer" while his wife, Barrett Williams, beamed. Eliza Dushku was up next. Introduced as "straight outta Watertown!," the oft-downloaded actress grabbed the mike to sing Madonna’s "Like a Prayer." (Lovely as she is, Dushku should keep her day job.) But the "Buffy" beauty did display decent beat-boxing skills, leading the cast and crew on a version of ’’Poison" by Boston’s own Bell Biv DeVoe. (Talk about keepin’ it real!)

Also in the house were "On Broadway" actors Bob Wahlberg, Peter Giles, Lucas Caleb Rooney, and Jill Flint, who’d just raced back after auditioning in the Big Apple for Dick Wolf. The film wraps Friday and, with any luck, will screen at the Sundance Film Festival in January.