This is from the NATIONAL ENQUIRER, so consider the source while reading.

They report that Diana, “who ditched her childhood chums from ’60s girl group The Supremes to seek solo stardom in the ’70s”, has stuck it to them again.

She said that she would appear on the MOTOWN 60 show, only if Cindy and Mary were banned from stage.

Another demand, according to the ENQUIRER, is that she would only do the Motown show if she got a spot on the Grammy Awards Show. But at the last minute Mary and Cindy were invited to sit in audience.

Again, consider the source.

https://www.nationalenquirer.com/pho...m-motown-bash/