The singer was part of the Atlanta-based CraigLewis Band.
The actress and producer exited the series last year after one season.
The actress spoke out about workplace inequality at a fashion event in New York.
“We are working with Gabrielle to come to a positive resolution,” NBC said Wednesday.
“Come on Terry, you know this ain’t right,” one fan said.
“I am still waiting on a good answer,” NBA legend said about Union’s abrupt exit from the series.
Union and fellow judge Julianne Hough recently exited the NBC series after one season.
The two appeared on the NBC competition series for one season.
The pair will replace two judges on the upcoming 14th season.
Audience gasped in horror during performer’s terrifying fall.