Celeb couples: whose love will last? Body-language expert Patti Wood analyzed the nonverbal cues given off by some of Hollywood's hottest duos to find out which romances are rockin' ... and which may be on the rocks.(informer)

* Coupling up in Hollywood can sometimes be more of a career builder than winning an Oscar. That's why high-profile pairs feel compelled to look happy and loving in public ... even when that affection is forced. And while it's tough to distinguish a smitten duo from a pair of fakers, body-language experts such as Patti Wood can tell the difference. In fact, Wood says she can assess what's up with a couple simply by observing which person is always leading when they are walking together. "It's not necessarily bad if one person is usually in front," she explains. "It's how far in front they are, how they relate to their mate behind them, and how their mate reacts that can be very telling."

We asked Wood to analyze some of the hottest celeb twosomes in Tinseltown and reveal how strong then relationships are based on their sauntering styles. As it turns out, it's not about talking the talk ... it's about walking the walk.

HEATH LEDGER AND NAOMI WATTS ddd

It's obvious that Heath calls the shots in this relationship. In the first picture, he walks a step in front of Naomi and holds her hand behind his body, which suggests that he's a little too obsessed with keeping their romance a secret. (It's normal for intensely private pairs to try to hide their affection, but this is over-the-top.) But the really alarming sign is in the second picture. Heath is still in front, and Naomi grasps his hand in a needy way, while he gives her no warmth or tenderness in return. It seems like Naomi is trying to hold on to something that isn't there anymore.

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DEMI MOORE AND ASHTON KUTCHER aaabbbc

Demi is always out in front, taking charge. Her age and media experience make her the natural person to take the lead, and Ashton appears to be completely comfortable letting her run the show (note how he willingly allows her to guide him along in all three pictures). The way their bodies overlap in the second shot indicates extreme closeness and intimacy. And their strong, tight handhold in the last picture (near left) is more proof that these two can't get enough of each other ... at least for now.