OLD FRIENDS FREAKING OUT!

Lisa Kudrow's 60th birthday grim news for Jen & Courteney

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ACTRESS Lisa Kudrow turns 60 this month, but sources say her age-freaked Friends co-stars Jennifer Aniston and Courteney Cox aren’t exactly thrilled about celebrating her big day.

A source snitches the sitcom sirens are all privately bummed about aging, especially in Hollywood where older female stars are mostly put out to pasture.