Beyonce Shoots Gun, Shakes Booty With Lady Gaga

Who knew Beyonce Knowles and Lady Gaga had so much in common?

In a music video for the remix of Beyonce's song "Video Phone," the pop icon and the avante-garde performer joined forces to take on voyeurs, camera-headed men and photographers.

The two also wear matching outfits -- white corsets, masks and high heels -- while singing about the thrill of talking to a lover on a video phone.

Including Lady Gaga in the video -- which was shot in early October and released on MTV at midnight Tuesday -- was a spur-of-the-moment decision, a source told

Beyonce, 28, called the "Poker Face" sensation, 23, at 2 a.m., and asked if she'd join her in an upcoming shoot in NYC -- the very next morning!

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"Beyonce and Gaga started hair and makeup for the shoot two hours later," a source told Us. "Everything had to be done that day because Beyonce was leaving town the next day. It was such a whirlwind."