Jordan Strauss/WireImage.comParis Hilton and Brooke Mueller have started filming their reality show for Oxygen, but the cameras weren't rolling last night when the new friends hit Us Weekly's Hot Hollywood party at Colony.
And even though Brooke was at a club late-night and looked out of it, I'm told it wasn't because she was imbibing:
"They've been shooting [the show] the past two days since 7 a.m., and she's up all night with her twin boys, so she doesn't get much sleep," a source close to Brooke tells me, adding: "She was with her sober coach."
Just like her (soon to be) ex-husband Charlie Sheen, Brooke has a sober coach to help her stay on the straight and narrow. (You know, somebody paid to hang out with you and be a good influence.)
Guess it's good that she's bringing her coach along to the club, but if she's so exhausted, why not stay in with her boys next time and get some rest?
No word yet, by the way, on whether her 1-year-old boys, Max and Bob, will be on the show with their mom.
Beyond Brooke, Paris was also joined by boyfriend Cy Waits, her aunt and Real Houswives star Kyle Richards and fellow friend and reality show costar Allison Melnick.
And when you're bringing your family and bf to a party, there's probably no need for a sober coach, too, right?