Ashton Kutcher Child Porn Avenger [PHOTO]

Ashton Kutcher got a firsthand look inside the world of child porn-busting Federal Agents -- riding along with investigators during a smut sweep in Northern California ... and TMZ has obtained pics of one of the raids!

The photos were snapped Thursday -- Ashton suited up with the San Jose police while officers served several arrest warrants in the area.

According to reports, Ashton took part in the sweeps as a representative of the Demi and Ashton Foundation -- a non-profit organization dedicated to the eradication of sexual slavery.

A spokesman for the San Jose police department said Kutcher was NOT a direct participant in the raids -- and was prohibited from entering the homes being raided, in accordance with police policy.

Authorities reportedly arrested at least three men during the sweep -- seizing computers and other evidence that allegedly show the men circulated videos of children having sex with adults.

Angelina Jolie & Brad Pitt A Happy Meal

TMZ has obtained photographic evidence that food, or rather a bag containing food, touched the hands of Angelina Jolie today in Los Angeles.

It is unclear whether or not this constitutes "eating."

According to our sources, she would have to consume the food inside the bag for it to constitute "a meal."

Jolie was the passenger in a car driven by Brad Pitt as they made their way through a McDonald's drive-thru.

Calls to a rep for Angelina's right leg were not returned.

Lindsay Lohan Almost Live from New York ...

Lindsay Lohan was seen leaving her New York hotel this morning, script in hand, as she gets ready to host "Saturday Night Live" tonight.

As TMZ previously reported, LiLo plans to sing her opening monologue and from there ... nothing is off limits. We're also told Lindsay has invited several famous friends to cameo on the show, but no word on exactly who will make an appearance. 

Lindsay Lohan I'm Gonna SING My Opening Monologue on SNL

Lindsay Lohan's taking her music career to the next level on SNL tonight -- TMZ has learned, the actress plans to SING the majority of her opening monologue on the sketch show.

Sources tell TMZ, nothing's off the table either -- Lindsay will poke fun at all the recent mishaps in her life ... arrests, endless court dates, necklace-stealing sagas, jail, morgue duty ... the list goes on.

But Lindsay won't be alone on stage -- we're told several cast members will join her in chorus.

Sources tell us, Lindsay wants to show the world she doesn't take herself as seriously as people think -- and actually has a sense of humor about the legal troubles that have plagued her the last few years.

We're told Lindsay has also extended several personal invites to famous friends to join her on the show -- and they unanimously accepted. No word yet on who the surprise guests might be.

Bottom line ... Lindsay knows there's a lot riding on tonight's performance -- so she's determined to make it one for the ages, practicing non-stop all week long.

Speaking of singing -- let's all take a moment to remember Lindsay's foray into pop music ...

Blake Lively 3 Years of Protection from Metaphysically-Obsessed Fan

Blake Lively just got 3 more years protection from an obsessed fan, who allegedly claimed he had a "metaphysical" connection with the actress -- because a judge extended Blake's restraining order today.

TMZ broke the story ... Blake obtained a temporary restraining order against Sergei Mifle last month -- claiming the guy made repeated contact with Blake's mom, begging to help Blake because she was troubled.

According to Blake, Sergei was spotted lurking around the set of "Gossip Girl" -- insisting he was there to help Blake "heal."

The judge extended the protective order today in L.A. -- requiring Sergei to stay at least 100 yards away from Blake and her mom for the next three years.

Kardashian Sisters SUED FOR $5 MIL Your Diet Pills Are BOGUS!!!!

Kim Kardashian and her sisters waged a campaign of LIES when they claimed they got their rock hard bikini bodies from a diet pill called QuickTrim ... this according to a new $5 MILLION lawsuit.

The point of the suit -- a bunch of people in NY claim there's no POSSIBLE way QuickTrim could've helped Kim, Khloe and Kourtney lose weight ... because the main ingredient is caffeine. According to the suit, "The FDA has determined [caffeine] is not a safe or effective treatment for weight control."

Enter the Kardashians ... celebrity spokespeople who are featured on just about every single product QuickTrim sells.

According to the suit, filed in NY by Bursor & Fisher, the Kardashians fed lies to the public through commercials, magazines and social media since 2009 ... like when Kim went on Twitter and said, "Our QuickTrim cleanse will be massive! Khloe has already lost so much weight."

The plaintiffs claim they would NEVER have purchased the QuickTrim products if they would have known the truth ... and claim the Kardashian testimonials were completely unsubstantiated.

Now, the Kardashians, QuickTrim and various companies that sold the products are being sued for more than $5 million in damages.

So far, no comment from the Kardashian camp. 

'16 and Pregnant' Star Arrested for Stealing Pregnancy Test

"16 and Pregnant" star Whitney Purvis was arrested in Georgia yesterday ... after cops say she  shoplifted a pregnancy test from a local Walmart ... and used it in the store.

According to the police report, the 20-year-old MTV star stashed a First Response pregnancy test in a hooded jacket ... and then "took it to the restroom with her and used one."

Purvis allegedly tried to sneak out of the store through a side door ... but she was busted by store security ... who put her under citizens arrest and called local police.

According to the report, the pregnancy test was valued at $15.98.

Purvis was hauled to a nearby police station where she was booked for misdemeanor theft by shoplifting.

Purvis was featured on the MTV show in 2009. Her mother was busted for meth in Georgia last year.