Pop princess Britney Spears may add heiress Paris Hilton as her latest guest singer on her new album.

Spears and Hilton have been photographed partying together in Los Angeles and Las Vegas and have reportedly been talking about a musical collaboration in the last two weeks, In Touch Online reported Thursday.

"Britney's going into the studio to finish her album," said a friend of Spears. "She and Paris have talked about doing a duet. People are saying it would be huge."

Hilton may travel with the singer to Miami where Spears is scheduled to go into the recording studio with producer Pharrell Williams.