Beyonce is set for another major musical collaboration - she's working on a secret project with Lady Gaga.

After teaming up with Shakira and husband Jay-Z on record and Tina Turner and Prince onstage, the "Single Ladies" star is set to test her fanbase with a Gaga diva duet on her upcoming single "Video Phone."

The pop stars were spotted shooting a video for the song in a New York studio together last week, and all those involved in the secret get together were instructed to keep details under wraps.

But one insider tells Life & Style magazine, "Everything on the set was being kept very hush-hush, and security was extremely tight. In the video, Beyonce wears a feathered dress. And of course Lady Gaga wears something wild. The fashion is sick and insane."

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(This news article provided by World Entertainment News Network)