[source: NME.com] Christina Aguilera and Aretha Franklin are planning a duet, according to DJ Premier.

The producer, who worked on Aguilera's Back To Basics album, claims the two are working on material together.

"Christina got back at me because she's doing a duet with Aretha Franklin," Premier said.

No release date is known for the duet, but it is thought it will feature on Franklin's forthcoming album, Jewels In The Crown: All Star Duets With The Queen, which is set to be released later this year.