The Motown legend will serenade guests as her 25-year-old son ties the knot with Ashlee Simpson on the evening of August 31 in a romantic ceremony held at her own mansion in Greenwich, Connecticut.
The 70-year-old diva is going to be joined on stage by her daughter Rhonda Ross Kendrick, E! Online is reporting.
And Diana has pulled out all the stops to make the wedding an A-list affair, adding none other than Stevie Wonder and Smokey Robinson to the guest list and fuelling rumours of a one of a kind performance.
'The Hunger Games: Mockingjay' actor Evan previously admitted The Supremes singer was taking a very hands-on role in planning his wedding.
He said: ''[My mother is] involved in every part of our wedding [and] engagement party.''
Evan also revealed he was so desperate to be married to Ashlee - who has a five-year-old son, Bronx, from her marriage to Fall Out Boy star Pete Wentz - that he was considering eloping.
He said: ''Honestly, we could go and get married right now, wherever. We just want to be married. We're in love.''
The 1969 session, including the only known recording of 'Sunshine Woman' by the band, will be included on a re-issue of 'The Complete BBC Sessions'...
The 55 year old actor joined Chris Martin and co. on stage in New Jersey to perform 'Earth Angel' and 'Johnny B. Goode'.
Bjork Digital comes to London's Somerset House in September, along with a single live show at the Royal Albert Hall.
Kim Kardashian released an audio excerpt from a phone call between Kanye and Taylor Swift over the lyrics of 'Famous' - but if it was recorded...
There's very much a strength of conviction in remaining what you were, but arguably more so in becoming what you want to be.
The BBC drama starring Aidan Turner returns to BBC One on September 4th.
Guns N' Roses were detained at the Canadian border last week for gun possession but they're adamant the weapon didn't belong to them.