Admit it, at some point you’ve felt like saying that to an unwelcome female flirt - and celebrities are no different.
Sexy star boyfriends are constantly surrounded by equally gorgeous female admirers. And their lady loves don't like it.
Just take the lovely Jennifer Aniston.
You’d think a celeb as stunning as Jen would have no worries with singer boyfriend John Mayer.
But then up pops his blonde LA mate Kimberly Stewart at the Hard Rock Calling gig in London last weekend.
We heard Jen had socialite Kim ejected TWICE from the VIP area, much to her annoyance.
Looks like Jen is going to great lengths to keep her man close after Brad fell for Ange, who in turn seems to keep her man on a tight leash.
So why do some celeb women act so paranoid?
Here, relationship expert Anjula Mutanda unpicks their possessive behaviour.
“There is an insecurity issue for some celebrity women, especially if gorgeous girls are prowling around their man,” says Anjula.
“Jealousy is a natural part of any relationship, but in Jennifer’s case, she’s been hurt by a man before and may wonder if her new boyfriend is going to stray.
“Sometimes there’s a feeling of ‘he’s too good for me’ or maybe he has a wandering eye.
“Both Jen and Ange have been in situations where they’ve either left a man for someone else, or have been left for someone else, so their instinct is to protect what they’ve got.
“Jennifer has dipped her toe in and out of relationships since Brad and could be finding it hard to settle.
“If John is a bit of a player, she needs to ask herself why she’s with him. She should build up her confidence and choose men wisely.
“If you are overly possessive of a man, take a closer look at who you are dating and your own self-esteem. A confident woman wouldn’t stand for a player – she’d say ‘if you do that again, it’s over’.
But Jennifer isn’t the only female star to stake a claim on her famous fella.
Click on the images above to see more possessive A-list ladies.