Dancing with the Stars commemorates a milestone, celebrating its 100th episode on May 6, 2008. In a special episode of "Dancing with the Stars the Results Show," viewers were treated with appearances by alumni from seasons past returning to celebrate this landmark.ABC/Kelsey McNeal - Wednesday, May, 7, 2008, 7:7 PM

Mario and his professional partner Karina Smirnoff, are the fifth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, May, 7, 2008, 4:7 AM

Mario and his professional partner Karina Smirnoff, are the fifth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, May, 7, 2008, 4:7 AM

Mario and his professional partner Karina Smirnoff, are the fifth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, May, 7, 2008, 4:7 AM

Cristian De La Fuente and Cheryl Burke perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Cristian De La Fuente and Cheryl Burke perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Tony Dovolani and Marissa Jaret Winokur perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Tony Dovolani and Marissa Jaret Winokur perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Jason Taylor and Edyta Sliwinska perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Jason Taylor and Edyta Sliwinska perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Karina Smirnoff and Mario perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Karina Smirnoff and Mario perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Kristi Yamaguchi and Mark Ballas perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Kristi Yamaguchi and Mark Ballas perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, May, 6, 2008, 5:6 AM

Shannon Elizabeth and her professional partner Derek Hough, are the fourth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, April, 30, 2008, 5:30 AM

Shannon Elizabeth and her professional partner Derek Hough, are the fourth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, April, 30, 2008, 5:30 AM

Shannon Elizabeth and her professional partner Derek Hough, are the fourth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, April, 30, 2008, 5:30 AM

Shannon Elizabeth and her professional partner Derek Hough, are the fourth couple to be eliminated from the 6th season of Dancing with the Stars.ABC/Kelsey McNeal - Wednesday, April, 30, 2008, 5:30 AM

Kristi Yamaguchi and Mark Ballas perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM

Karina Smirnoff and Mario perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM

Edyta Sliwinska and Jason Taylor perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM

Derek Hough and Shannon Elizabeth perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM

Tony Dovolani and Marissa Jaret Winokur perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM

Cristian De La Fuente and Cheryl Burke perform a dance on the sixth season of Dancing with the Stars.ABC/Kelsey McNeal - Tuesday, April, 29, 2008, 3:29 AM