Pakistan, June 26 -- Hollywood friendships come and go. Drew Barrymore and Cameron Diaz? They have survived decades, heartbreaks, career highs and apparently more text messages than anyone could count. Barrymore took to Instagram this week to celebrate her longtime best friend, sharing a series of photos and a message that reminded fans why their friendship remains one of Hollywood's most enduring.

"Cameron and I have been best friends since we were teenagers," Barrymore wrote. "She's been there for me in good and bad times. That's my why."

She followed it up with a public love note to Diaz, "Who has been there for you? Let's show people the love they deserve!! Hey @camerondiaz, I love you."

The post quickly reignited admiration for a ...