Actress having stress headaches, claims US mag

Katie Holmes is said to be struggling to keep up with husband Tom Cruise’s energetic lifestyle.

‘Katie doesn’t get enough sleep and hasn’t for months now,’ a source tells American Star.

‘She’s tired and drained much of the day because Tom is so wired and they stay awake until after midnight. He has boundless energy and she just can’t compete.’

It’s claimed the mum-of-one feels stressed about being in charge of renovating their £17.5 mansion and fainted in a LA restaurant recently.

‘It’s on Katie’s shoulders to pull off something beyond magnificent, something Tom can brag about,’ adds the source. ‘She’s giving herself headaches thinking about it and making herself sick.’

Katie, 29, and Tom, 45, married in 2006. They have a 2-year-old daughter, Suri, together.

 After weeks of back-and-forthing between our people and hers, the Style section regrets that we blew our chance to sit down with Katie Holmes in New York last week to talk about her new film, “Mad Money.” (The one where she, Diane Keaton and Queen Latifah make like D.C. property tax office managers and steal piles and piles of cash — buthilariously.)

The Post was not able to acquiesce to Holmes’s publicist’s requests — especially that the celeb not be asked about a certain Los Angeles-based church. Several publications apparently agreed to this condition, but not us. Until it fell to pieces, we were prepared to go for broke with the following questions . . .- We have a guest bedroom and bathroom in our apartment, almost zero neighborhood paparazzi, and the fridge is full of diet sodas and healthy snacks. You could stay as long as you like, and we promise not to tell a soul. Would you like to leave with us right now?(Note: Ask again, offering her the option of just blinking twice if the answer is yes.)- How much cash do you have on you, at this moment? Could you break a 50? (It’s related to the movie!)- You just told David Letterman that your 2-year-old daughter — her name is Suri, right? — always sleeps from 11 p.m. until 9 a.m., uninterrupted, every night. Other than a crack staff of nannies, we’re sure our readers with young children want to know: What’s your secret?- Did you feel all totally Juno, getting pregnant and giving birth before you got married? When did you decide to keep your baby? When did you tell Dawson that it was (allegedly) Tom’s?

Is it that time of year again? Wow, we’ve got to get hoppin’ on those New Year’s resolutions. We can just imagine that our fave dish celebs are resolving to not totally humiliate themselves again in their ever-desperate quest for attention. But before we ring in a new year of rehab, jail stints and hair don’ts, let’s look back at the most pointless celebrities of ‘07:

1. Britney Spears

• This was Britney’s year to shine like a greased pig. No one could have possibly scripted her magnificently terrible meltdown — her stupidity is her genius. She parties sans panties, shaves her head, breezes through a few hours in rehab, still drives without a license, stumbles bloatedly through her “comeback” performance at the VMAs, loses custody of her kids to some low-rent, wannabe rapper — way to go. She’s not only Pointless Emeritus, but she’s also worst mother of the year. New Year’s resolution: Don’t pull an Anna Nicole Smith.

2. KATIE HOLMES