The highest score may have been 28 out of 30 on Monday night's "Dancing with the Stars," but ET's special correspondent Marie Osmond celebrated her big 5-0 backstage.

The birthday girl, who celebrated one day early, must believe it is better to give than to receive. Instead of getting a present from her brother Donny, she gave him a doll replica of himself. She told him to give it to judge Bruno Tonioli so he can remember their impromptu smooch on last Monday's show. Donny responded, "I want to forget about that thing. This is just going to perpetuate it."

Melissa Joan Hart and partner Mark Ballas were awarded their first perfect scores of the season, tying them with Mya atop the scoreboard with 28 points. Melissa is "over the moon" with their score. The couple truly got into character for their 1920s inspired Charleston routine. Mark said his fake mustache is "itchy," but he was determined to sell his role through and through.

The competition is getting fierce and the celebs reveal which of their competitors they most want to sabotage. Watch the video for more and don't forget to tune in Tuesday night to find out which couple will be sent home on ABC's "Dancing with the Stars." For a complete recap of Monday's performance show, click here.