> on August 28, 2009 in Los Angeles, California.

*Of course Diana Ross will give her son Evan the gift of her voice at his upcoming wedding.

Even and Ashlee Simpson will reportedly exchange vows in August, and Ashlee’s soon-to-be mother-in-law will take on the role of wedding singer, according to E! News.

The insider also reveals that The Boss will be joined onstage by her daughter Rhonda Ross Kendrick.

The wedding will reportedly take place at one of Diana’s sprawling mansions in either Los Angeles or Connecticut, and fellow Motown legends Stevie Wonder and Smokey Robinson are expected to be among the guests.

This will be Evan’s first wedding and the second for Ashlee, who was married to Fall Out Boy’s Pete Wentz from 2008 to 2011.

She has a six-year-old son, Bronx Mowgli, with the rocker.