Aretha Franklin

PASADENA, CA - SEPTEMBER 07: Singer Aretha Franklin onstage at the 10th Annual Soul Train Lady of Soul Awards held at the Pasadena Civic Auditorium on September 7, 2005 in Pasadena, California. (Photo by Kevin Winter/Getty Images)

Smokey Robinson and the Miracles

DETROIT, MI - OCTOBER 20: Motown legend Smokey Robinson sits for an interview at a 50th anniversary celebration of Motown October 20, 2007 in Detroit, Michigan. the event featured a reunion of Motown legends Smokey Robinson and the Miracles, and a tribute to Berry Gordy by Smokey Robinson. (Photo by Bill Pugliano/Getty Images)

Gladys Knight and The Pips

HOLLYWOOD - FEBRUARY 7: Gladys Knight and one of the remaining pips perform at the Universal Amphitheatre on February 7, 2004 in Hollywood, California. (Photo by Tim Mosenfelder/Getty Images)

Al Green

Al Green performs at the Music Midtown Festival in Atlanta, Georgia. 5/5/01 Photo by Scott Gries/ImageDirect

The Temptations

The Temptations (L.to R.), Barrington Henderson, Otis Williams, Harry McGiberry Jr., Terry Weeks and Ron Tyson at the premiere of 'What Women Want' at the Village Theater in Los Angeles, Ca. 12/13/00. (Photo by Kevin Winter/Getty Images).

Stevie Wonder

Stevie Wonder performing at the VH1 Divas Live: The One and Only Aretha Franklin concert at Radio City Music Hall in New York City. The concert was a benefit for the VH1 Save The Music Foundation. (Photo: Frank Micelotta/ImageDirect)

Luther Vandross

Luther Vandross at the 'Tonight Show with Jay Leno' at the NBC Studios in Burbank, Ca. 6/20/01. (Los Angeles) Photo by Kevin Winter/Getty Images

Jackson 5

KANSAS CITY - JULY 6 : Michael Jackson of the Jackson Five performs on stage during the Jackson 5 Victory Tour at Arrowhead Stadium,Kansas City on the 6th of July 1984.(Dave Hogan/Getty Images)UK NEWSPAPERS OUT WITHOUT PRIOR CONSENT FROM DAVE HOGAN. PLEASE CONTACT SALES TEAM WITH ENQUIRIES

Roberta Flack

NEW YORK - APRIL 19: Singer Roberta Flack attends the Dress For Success "April In Paris" annual gala at Marriott Marquis on April 19, 2005 in New York City. (Photo by Thos Robinson/Getty Images)

Percy Sledge

NEW YORK - MARCH 14: Inductee Percy Sledge arrives at the 20th Annual Rock And Roll Hall Of Fame Induction Ceremony at the Waldorf Astoria Hotel March 14, 2005 in New York City. (Photo by Evan Agostini/Getty Images)

Isley Brothers

The Isley Brothers arrive at the 29th Annual American Music Awards at the Shrine Auditorium in Los Angeles Wednesdsay, January 9, 2002. Photo by Frank Micelotta/ABC/ImageDirect

Barry White

SYDNEY - AUGUST 01: Singer Barry White at a press conference in Sydney during his visit to Australia. (Photo by Patrick Riviere/Getty Images).

Prince

NEW ORLEANS - JULY 2: Prince performs at the 10th Anniversary Essence Music Festival at the Superdome on July 2, 2004 in New Orleans, Louisiana. (Photo by Chris Graythen/Getty Images)

Freddie Jackson

NEW ORLEANS - JULY 2: Freddie Jackson performs in one of the Superlounges at the 10th at the 10th Anniversary Essence Music Festival at the Superdome on July 2, 2004 in New Orleans, Louisiana. (Photo by Chris Graythen/Getty Images)

Patti Labelle

PARK CITY - JANUARY 19: Singer Patti Labelle attends the premiere of the film "The Woodsman" at the Library Center Theatre during the 2004 Sundance Film Festival January 19, 2004 in Park City, Utah. (Photo by Frazer Harrison/Getty Images)

Lionel Ritchie

LOS ANGELES - DECEMBER 2: (US TABS OUT/HOLLYWOOD REPORTER OUT) Singer Lionel Ritchie arrives for the premiere party for "The Simple Life" on December 2, 2003 at Bliss in Los Angeles, California. (Photo by Doug Benc/Getty Images)

Earth, Wind and Fire

Earth, Wind and Fire at the ASCAP15th Annual Rhythm & Soul Awards at the Beverly Hilton Hotel in Beverly Hills, Ca. Monday, June 17, 2002. Photo by Kevin Winter/ImageDirect.

Fontella Bass

Fontella Bass performing at the Rhythm & Blues Foundation's 12th annual Pioneer Awards at the legendary Apollo Theatre in New York City on November 8, 2001. photo by Gabe Palacio/ImageDirect

Sly and the Family Stone (except for Sly)

Original members of Sly and the Family Stone (except for Sly) at the VIP reception for the Rhythm & Blues Foundation's 12th annual Pioneer Awards in New York City on November 8, 2001. photo by Gabe Palacio/ImageDirect

Jermaine Jackson

BEVERLY HILLS - DECEMBER 7: Recording artist Jermaine Jackson attends the First Annual Golden Apple Awards at the Friars Club of Beverly Hills December 7, 2002 in Beverly Hills, California. Jackson and George Barris and the late Stanely Kramer were honored at the event. (Photo by Frederick M. Brown/Getty Images)

James Brown

369202. James Brown performs with on the ''Rosanne'' talk show at CBS studios, West Hollywood on May 11th. (Picture by DAN CALLISTER Online USA Inc)

Diana Ross and the Surpremes

E367079 05: Diana Ross, center, and two former members of the Supremes, Lynda Laurence and Scherrie Payne hold a news conference April 4, 2000, at Grand Central Terminal in New York City to announce the upcoming U.S. tour of Diana Ross and the Surpremes. (Photo by Chris Hondros)

Ray Charles

LOS ANGELES - SEPTEMBER 26: Recording artist Ray Charles speaks during press conference announcing the Ray Charles On Ice television special on September 26, 2002 in Los Angeles, California. The event will be taped at the Staples Center on October 5, 2002 and air December 21, 2002 on the NBC Television Network. (Photo by Frederick M. Brown/Getty Images)

Diana Ross

Entertainer Diana Ross receives applause from the audiance during a tribute to the memory of slain civil rights leader Martin Luther King Jr. at the 27th Annual American Music Awards at the Shrine Auditorium January 17, 2000 in Los Angeles, California. (Photo by Chris Martinez/OnlineUSA)