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Katie Holmes paid homage to the legendary Judy Garland in a big way on Thursday's "So You Think You Can Dance," performing her much-anticipated song-and-dance tribute to "Get Happy."

"I don't think she's ever looked more beautiful," judge Mary Murphy told after Holmes' performance as part of the SYTYCD results show in Los Angeles. "She reminded me of regal Old Hollywood."

As Us previously reported, Holmes danced and sang to Garland's "Get Happy" from the 1950s musical Summer Stock, wearing an all-black ensemble similar to one Garland once wore. The routine was conceived by Emmy-nominated choreographer and Holmes' pal, Tyce Diorio.

At one point in the routine, Holmes -- who also pranced around in a black velvet fedora, nylon stockings and body-hugging skirt -- was lifted over three dancers' heads. For her finish, she tossed her hat in the air, and one of the other male dancers -- which included SYTYCD alums Mark Kanemura and Joshua Allen -- caught it.

Garland's son, Joey Luft, was in attendance at Thursday's taping, and saw Holmes' tribute to his late mom.

"I bet Judy Garland's giving [Katie] a standing ovation in heaven," Murphy said.

Holmes signed on to perform for the show's 100th episode after judge/executive producer Nigel Lythgoe approached her to join the board of directors for his Dizzy Feet Foundation, which offers scholarships to underprivileged youth.

"She put herself out there and she didn't have to do that, so I'm very delighted in her performance," Lythgoe told Us of the actress, who donated her full performance fee to Dizzy Feet Foundation.

"I think it is important to experience music and dancing and singing and the arts and sports," Holmes said on the show. "This is the next generation. I think it is important to give them every opportunity to grow and discover what it is that they like and to have access to the best. "

After her TV performance, Lythgoe says Holmes has been bitten by the dancing bug.

"Katie's really taken to dancing," the judge said. "She is filming a movie in Australia and called me and said, 'I have found some great classes to take in Melbourne while I'm here.' She got really hooked on it!"


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