OMG this picture is everything!!! That aesthetic, it's so distinctively 70's from the bell bottoms to the overall, crop-top and afro.
En Vogue, Beyoncé & Solange (1992) Of course in those days En Vogue were the stars and Beyoncé was still singing in Girls Tyme, who would eventually become Destiny's Child and score their first hit just 6 years later in 1998.
Destiny's Child with Tia and Tamera Mowry (1999) Both Mowry sisters sang with the group Voices in the early 1990's. Their single 'Yeah, Yeah, Yeah!' actually appeared on the Hot 100 in 1992.
Diana Ross & The Jones Girls (1979) They sang back-up for her, but this is the only photo of them together I know of. They signed to their first major label the year prior and released their self-titled debut that year. Who Can I Run To? Remains an all-time favorite.