Background: Labelle is an American all-female singing group who were a popular vocal group of the 1960s and 1970s. The group was formed after the disbanding of two rival girl groups in the Philadelphia/Trenton areas, the Ordettes and the Del-Capris, forming as a new version of the former group, later changing their name to The Blue Belles (later Bluebelles). The founding members were Patti LaBelle (formerly Patricia Holt), Cindy Birdsong, Nona Hendryx and Sarah Dash. As The Bluebelles, and later Patti LaBelle and the Bluebelles, the group found success with ballads in the doo-wop genre, most notably "Down the Aisle (The Wedding Song)", "You'll Never Walk Alone" and "Over the Rainbow".
Context: Following her departure from the Blue Belles, Cindy Birdsong enjoyed success as member of the Supremes, singing background on hits such as "Stoned Love". Birdsong prominently left the group in 1975, only sporadically recording music as a solo artist. The song, "(Can I Speak to You Before You Go To) Hollywood", from Pressure Cookin', was allegedly written by Hendryx as a response to Birdsong's departure, featuring each band member singing verses. Sarah Dash found some solo success after signing with Don Kirshner's label, with the disco single "Sinner Man". Dash eventually sang backup for the Rolling Stones and sung for Keith Richards' spinoff group X-pensive Winos. The more experimental Nona Hendryx has recorded in various genres including hard rock, hip-hop, house and new age, and charting with the singles, "Keep It Confidential" and "Why Should I Cry?" Patti LaBelle became an international solo superstar following Labelle's departure, recording crossover hits such as "New Attitude", "Stir It Up" and "On My Own", resulting in Grammy wins and a star on the Hollywood Walk of Fame.  In 1991, Patti LaBelle reunited with Nona Hendryx and Sarah Dash on the track, "Release Yourself", from LaBelle's Grammy-winning album, Burnin. The trio reunited onstage at the Apollo Theater in 1991 to perform the song on LaBelle's second concert performance video while promoting the release of Burnin'. In addition to "Release Yourself", Hendryx and LaBelle composed the gospel-flavored ballad "When You've Been Blessed (Feels Like Heaven)". In 1995, the trio reunited again for the dance single, "Turn it Out", for the soundtrack to the film, To Wong Foo, Thanks for Everything! Julie Newmar. The song became their first charted hit in nineteen years peaking at number-one on the Billboard dance singles chart. Four years later, the original Blue Belles reunited to receive an award from the R&B Foundation for Lifetime Achievement. In 2008, Labelle reunited for their first studio album in 32 years with the critically acclaimed Back to Now.  That year, the trio went back on tour together which carried through the spring of 2009. In an interview with the Toronto Star, Patti LaBelle explained why she, Dash and Hendryx waited over 32 years to record a full-length album: "You don't want to half-step something this important....it was about finding the right time and place. We were never ones to do anything on anyone else's time anyway; we were always unconventional. I still have my glitter boots to prove it."  The group performed a triumphant show at the Apollo Theatre in New York City on December 19, 2008.
Question: Who embarked on a solo career?. Whats the answer?
Birdsong prominently left the group in 1975, only sporadically recording music as a solo artist.