It's about time!

A duet between Britney Spears and Lady Gaga may be in the works soon, a source close to the pop stars said: "It'll happen soon."

Gossip of the collaboration began when Lady Gaga attended one of Britney's Las Vegas shows, after which she posted a photo of the two of them on her Twitter, captioning it, "Me and Brit Brit. She looked so gorgeous, the show was so much fun, and her dad gave us THE BEST BBQ. It was a #MonsterParty!"

"During the song 'Till the World Ends,' Gaga walked to the pit and tossed Britney roses... Brit blew her a kiss!" an eyewitness at the concert noted.

Back in December, Britney expressed interest in getting together with Lady Gaga for a track: "I would do a duet with Lady Gaga. I think that would be a lot of fun. I think she's very different and interesting and intricate, and I like her as an artist."

In response, Lady Gaga replied, "Let's do this b***h, it's time," on her Twitter.

So what's the hold up, ladies?

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