The two singers were spotted shooting a video for the song in a New York studio together.The two singers were spotted shooting a video for the song in a New York studio together last week and all those involved were instructed to keep details under wraps, Life and Style magazine reported.
"Everything on the set was being kept very hush-hush, and security was extremely tight," a source said.
Beyonce had earlier collaborated with rap mogul and husband Jay-Z and Columbian pop sensation Shakira on record She has also performed with stars like Tina Turner and Prince onstage.
The 28-year-old singer is now on a lookout to test her fan base with a Gaga diva duet on her upcoming single 'Video Phone'.
"In the video, Beyonce wears a feathered dress. And of course Lady Gaga wears something wild. The fashion is sick and insane," the source added.
