Reese Witherspoon and Jake Gyllenhaal apparently enjoyed many treats and more than a few tricks this Halloween. Us reports the suddenly snuggly if suspicion-surrounded squeezes -- who dressed up as a witch and an ape, respectively -- couldn't hide their affection as they took the actress' two tykes, Ava, 8, and Deacon, 4, door-to-door. "They were holding hands and swinging them in the air as they walked around the neighborhood," recalls a spy. "Reese was laughing at everything Jake was saying." They also shared some kisses and "flirted" as the kids collected their sugary booty. "Jake tapped Reese on the butt and then she hit him back -- they began running a circle hitting each other!" the eyewitness tells the mag. "Then Jake picked Reese up off her feet and she screamed." Perhaps she was just reacting to the uncomfortable feeling of fake fur rubbing against her skin. "Sometimes he came up from behind and nuzzled his big hairy mask into her neck," the bystander says of the dreamy-eyed actor, who stepped out over the weekend without the hotness-depleting facial hair he's been sporting.

Goody two-shoes starlets grow up so fast these days. According to the New York Daily News, Hilary Duff was recently spied whooping it up into the wee small hours at a New York club, where she purportedly gave "lap dances" to a "mystery man" who was a "look-alike" for her ex, Joel Madden. Chances are the guy in question was her NHL boyfriend Mike Comrie, who presented her with a bow-topped Mercedes for her 20th birthday back in September. The shiny-toothed duo was spotted strolling hand-in-hand around Manhattan last weekend.

Nick Lachey and Vanessa Minnillo are set should they ever be called upon to perform a Stupid Human Trick. People magazine says the lately low-key lovebirds made a spectacle of themselves during a recent bash at S Bar in Los Angeles as they shared a sweet treat using only their mouths. Vanessa stuck half a candy bar between her lips and moseyed over to Nick, who responded to her bon-bon come-on by gobbling the protruding half. The couple, who are both celebrating birthdays on Nov. 9, were more hands-on over the weekend as they cuddled up for photogs during a getaway to Puerto Rico.

Here's a celebrity trend we never expected to take off: paparazzi-captured supermarket smooching. Months after Kate Hudson was snapped sucking on Dax Shepard's tonsils in the produce section of a grocery store, Kate Walsh has been caught doing the same thing with her studio exec husband Alex Young. The newlyweds went in for a clinch while pushing their cart down -- appropriately enough -- the spice aisle of a Los Angeles market on Saturday. They also got their mack on in the meat section, but we're not gonna touch that one.

Just last month, Tyra Banks was shooting down rumors that she'd gotten engaged to her businessman boyfriend John Utendahl, whom she began dating in July. Now, the New York Daily News claims the self-adoring small-screen mogul was spied enjoying the company -- and lips -- of a "gorgeous model type" while dining out in Manhattan on Oct. 26. Alleges an onlooker, "They looked so great together and they were making out at the table."

Next: Stork Report: Cate, Xtina, Milla, J.Lo and More