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Whatever is going on with Christina Milian and Lil Wayne, there's one thing for sure—they love working together.

Milan confirms that her new single featuring the rapper, "Do It," is actually about them.

In the song, the Christina Milian: Turned Up star sings about falling in love with a bad boy. The lyrics include, "Baby I don't usually do this/Usually a virtuous woman/Now we don't even know what we doing/But I'mma go ahead and do it/Do it, do it/Just have fun/Do it, do it."

Lil Wayne's verses are much more NSFW with lyrics that include, "She said she ain't had no good d--k lately/Well it's your luck today/Treat me like Vegas."

At last night's launch party for Verizon's new mobile video service, go90, Milian played coy when I asked about their relationship. "I know what's up, he knows what's up," she teased.

Christina Milian, Lil Wayne, American Music Awards 2014

Kevin Winter/Getty Images

They're set to shoot the video for "Do It" next weekend. "The song is sexy. It's about the two of us so it's going to be sexy," Milian said.

Milian turns 34 tomorrow. Even though Lil Wayne's birthday is the following day (he'll be 33), Milian said she'll be celebrating with a "little mommy-daughter time" with her daughter Violet on an island near The Bahamas.

"I want my daughter to see the nice beautiful sea blue," Milian said. "She deserves that."

Watch the season two premiere of Christina Milian Turned Up on November 10 at 10PM, only on E!