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

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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.