By People Staff
Updated October 13, 2009 12:00 AM
Credit: Craig Sjodin/ABC(2)

Week 4 on Dancing With The Stars brought out four new routines–the bolero, two-step, lambada and Charleston–three perfect scores, two leaders and one elated former teenage witch.

Melissa Joan Hart charmed the crowd with a jumpy Charleston that had audience member Gilles Marini and his plus-one, Brothers and Sisters costar Rachel Griffiths, on their feet. “I’ve gotten lots of perfect scores in past seasons but tonight is my proudest 10 I’ve ever gotten,” Hart’s dance partner Mark Ballas said after the show. “Going from a score of 19 to 28 in a week, it’s unheard of!”

Melissa’s effort, however, couldn’t knock last week’s frontrunner, Mya, from the top of the leader board. With a hot lambada, a.k.a. “the forbidden dance,” that had judge Bruno Tonioli fanning himself, Mya and Dmitry Chaplin also scored a 28. But they once again failed to please head judge Len Goodman. “I felt in the lambada I was going to get a little bit more,” he told the couple as the audience’s boos got louder.

Joanna Krupa and a shirtless Derek Hough also fired up the competition with a lambada that the judges said could have pushed the show out of family-friendly territory. “All I can say is I hope that the children were in bed!” said Carrie Ann Inaba. “I bet some of the adults are now,” host Tom Bergeron added.

And though some succeeded, others struggled. Chuck Liddell and Louie Vito fell flat with their country two-steps, Michael Irvin also couldn’t break the 20-point mark and the judges shared some harsh but constructive criticism with Aaron Carter: “You have to chill out. You’re trying too hard,” Carrie Ann told the singer about his over-the-top lambada that had more tricks than technical moves.

One of the night’s most-improved awards? That would go to Kelly Osbourne, who brought Broadway to the dance floor with a 1920s-esque Charleston. Len told her and partner Louis Van Amstel they could have used a bit more swivel, but Bruno assured them it “was a very good performance. You should be happy!”

Full list of couples and their scores: Chuck Liddell and Anna Trebunskaya: 17 Melissa Joan Hart and Mark Ballas: 28 Natalie Coughlin and Alec Mazo: 24 Aaron Carter and Karina Smirnoff: 18 Mark Dacascos and Lacey Schwimmer: 22 Kelly Osbourne and Louis Van Amstel: 23 Joanna Krupa and Derek Hough: 26 Donny Osmond and Kym Johnson: 24 Michael Irvin and Anna Demidova: 16 Louie Vito and Chelsie Hightower: 16 Mya and Dmitry Chaplin: 28 Eunice Oh

Craig Sjodin/ABC(2)