Robinson agreed to work with the group after hearing LaBelle sing the song "I Sold My Heart to the Junkman".

The Starlets' manager sued Harold Robinson after the Blue Belles were seen performing a lip-synching version of the song on American Bandstand.

[4][6] However, when the single, "Someday We'll Be Together", hit number one, the group made their final television appearance with Ross, performing on The Ed Sullivan Show on December 21, 1969.

The group had a hit with the Four Tops with a cover version of Ike & Tina Turner's "River Deep – Mountain High".

[4][15] In June 1977, Wilson performed a "farewell" concert with The Supremes (by then Scherrie Payne and Susaye Greene) and thereafter embarked on a solo career.

Later that fall, Wilson was forced to play several Supremes dates, most notably in South America, that Payne and Greene would not fulfill on such short notice.

In 1983, Birdsong joined former Supremes Mary Wilson and Diana Ross in a one-off reunion on the Motown 25 anniversary television special.

In 1999, she reunited with The Bluebelles, who changed their name to Labelle after Birdsong's departure, for the first time in thirty-two years as the group accepted an R&B Foundation Award for Lifetime Achievement, singing "You'll Never Walk Alone" together.

[18] In 2004, Birdsong joined Mary Wilson and Kelly Rowland (of Destiny's Child) to perform a medley of Supreme hits for the Motown 45 anniversary television special.

[21] In June 2023, The New York Times printed a full length article on Birdsong's health and financial status.

Her son David filed a lawsuit against Brad Herman who had been credited for "rescuing" Cindy from her financial and medical woes.

[25] In December 1969, Birdsong was kidnapped while returning to her Los Angeles apartment with then–boyfriend Hewlett and their friend, Howard Meek.

[27] Birdsong managed to unlock the car door while Collier was driving and jumped out of the vehicle onto the Long Beach Freeway to safety.

'[28] Days later, Charles Collier, a maintenance man at Birdsong's apartment, surrendered himself in to Las Vegas police.