Katy Perry left children in tears at a recent birthday party where she dressed up like a clown, attacked some guy with a piñata stick, and staged a scary car accident ... all for a music video -- and TMZ has video from the scene.
The hidden camera gag was shot at Knollwood Country Club outside L.A. earlier this month for Katy's "Birthday" video -- Katy showed a little preview on "Jimmy Kimmel Live" Monday night ... but her clip didn't include the crazy fallout.
Eye witnesses tell TMZ, Katy pranked a REAL 5-year-old's birthday party ... and most guests had no idea they were getting punk'd. Children were crying. One woman stormed away, visibly upset.
Check out the video ... at one point a little girl says, "Mommy, I want to leave."
We know the feeling, kid.
Guess Who This Smiley
STUD TURNED INTO!
4/23/2014 12:10 AM PDT BY TMZ STAFF
Before this grinning little guy was a Hollywood hunk he was just another cool kid growing up in Palo Alto, California. Can you guess who he is?
'Fast & Furious 7'
3-Year-Old Twin Actors
Score a Fortune
4/21/2014 7:41 AM PDT BY TMZ STAFF
There's a set of twins that may already have their college educations paid for ... because they're banking a HUGE sum of money in the new "Fast & Furious 7."
Charlie and Miller Kimsey were born in 2010. According to their contracts -- obtained by TMZ -- they play Jack, the son of Paul Walker's character in the flick. They are paid handsomely -- $3,276.90 per week -- EACH.
They've already started filming. It's unclear how many weeks the kids will shoot.
One thing's for sure ... they won't have to sell lemonade this summer.
Guess Who This Adorable
DOLL TURNED INTO!
4/21/2014 12:05 AM PDT BY TMZ STAFF
Before this chubby little lady became the epitome of a Hollywood blonde bombshell she was just another bouncing baby in the Chicago suburbs. Can you guess who she is?
Guess Who This Bat Boy
4/18/2014 12:10 AM PDT BY TMZ STAFF
Before this beat-dropping little boy became a world renowned DJ he was just another Batman lovin' lad growing up in California. Can you guess who he is?
Fiance Is All-Pro
4/18/2014 12:02 AM PDT BY TMZ STAFF
$1 MIL Life Insurance Policy for Kids
4/17/2014 12:30 AM PDT BY TMZ STAFF
Roger Rodas -- who died with Paul Walker in a fiery car crash -- left his children lots of financial security ... in the form of a $1 million life insurance policy.
Rodas' kids are 10 and 12. Their mom, Kristine Rodas, has petitioned for a guardianship ... presumably so she can manage the money on behalf of her children.
There are tinges of sadness in the legal docs. Kristine says she's the children's closest adult relative and their relationship is "loving."
The good news ... Roger provided well for them.
Billy Hunkee in "Soul Plane"
4/17/2014 12:10 AM PDT BY TMZ STAFF
Ryan Pinkston was only 15-years-old when he played the dweeby white kid Billy Hunkee -- opposite Tom Arnold -- in the 2004 comedy "Soul Plane." Guess what he looks like now!
Files for Divorce from Amy Poehler
4/16/2014 4:57 PM PDT BY TMZ STAFF
This is not a trick, Michael -- "Arrested Development" star Will Arnett has officially filed for divorce from Amy Poehler ... nearly two years after the couple separated.
According to court documents, Arnett wants joint legal and physical custody of their two sons aged 5 and 3. He also wants visitation.
43-year-old Arnett and 42--year-old Poehler got married in 2003.
Since they separated, Arnett has reportedly been dating Billy Joel's ex-wife Katie Lee and Poehler has been linked to comedian Nick Kroll.
This is Arnett's second divorce and Poehler's first.
Guess Who This Skater
4/16/2014 12:10 AM PDT BY TMZ STAFF
Before this mini man marched to the beat of his own drum he was just another skater hanging out in Fontana, California. Can you guess who it is?
'Southern Charm' Star
I Gave Birth (For Real)
To My Co-Star's Baby
4/15/2014 12:04 PM PDT BY TMZ STAFF
So much for reality television ... the 21-year-old star of "Southern Charm" who had a pregnancy scare on the show -- but said her test came back negative -- just had a baby.
Sources close to the show tell us Kathryn Dennis gave birth to a healthy baby girl 2 weeks ago -- the very day the pregnancy-scare episode aired on Bravo. And the baby daddy is her mega-rich 50-year-old co-star Thomas Ravenel.
The hookup between Kathryn and Ravenel was one of the big storylines on the show ... but at the time, pregnancy tests showed Kathryn was NOT pregnant.
But after filming ended, we're told Kathryn and Ravenel began shacking up in Palm Beach, FL -- where they now live as a couple -- and Kathryn got pregnant for real.
Fun Fact: Ravenel is a former treasurer of South Carolina who was was forced to resign and served 8 months in prison ... after he was convicted in 2007 of cocaine distribution.
Little Brother Rory in
"8 SIMPLE RULES"
4/15/2014 12:05 AM PDT BY TMZ STAFF
Martin Spanjers is best known for playing the younger brother Rory -- opposite Kaley Cuoco, Katey Sagal and John Ritter -- in the short run family comedy "8 Simple Rules... For Dating My Teenage Daughter." Guess what he looks like now!
Guess Who This Frozen
FACE TURNED INTO!
4/14/2014 12:05 AM PDT BY TMZ STAFF
Before this coned kid cliff dove onto the silver screen she was just another little lady enjoying a sweet treat in Queens, New York. Can you guess who she is?