Benji Madden knows how to write a love letter for his wifey Cameron Diaz

Blake Shelton and Gwen Stefani. Miley Cyrus and Liam Hemsworth. Mila Kunis and Ashton Kutcher. Blake Lively and Ryan Reynolds. These are just a sampling of the celeb couples we are constantly gushing over — and rightfully so, because they are all pretty darn cute.

But how come we’re never paying attention to the marriage of Benji Madden and Cameron Diaz? Madden just posted the most adorable birthday message to his wife on Instagram that got us wondering why they don’t get more love from the public.

“Happy Birthday to my beautiful Wife,” Madden captioned a silhouetted pic. “You’re my best friend and I’m so thankful for you, sometimes I just want to tell the world… Generous, Kind, Compassionate, Selfless, Humble, Thoughtful, Patient and Loyal. Just a few of the qualities I would use to describe who you are, consistently, everyday. Thanks for being you, I’m a lucky guy… Here’s to many more… I love you @camerondiaz.”

More: CONFIRMED: Benji Madden and Cameron Diaz are married

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A post shared by Benji Madden (@benjaminmadden)

Somebody call a dentist, cuz these two are giving us a toothache. How are Madden and Diaz not constantly talked about as a celebrity couple fave?

Maybe it’s because they have both gotten pretty skilled at maintaining a low public profile since they got together. They’re rarely captured by paparazzi and they keep things private. It is, after all, the Hollywood couples who manage to stay out of headlines that usually end up in it for the long haul.

But that doesn’t mean they aren’t all about supporting one another, either. In addition to the cute birthday post above, Madden also gave an Instagram shout out to his sweetheart back in April, when her book The Longevity Book was released.

More: Butts, babies or singing: Which scares Cameron Diaz the most?

“I’m so proud,” he wrote in the caption. “My best friend, my Heart, and the most bad ass Chick I know… Go get’em baby #luckyman #mywife #bestseller #keepliving #newaging.”

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The man has got a way with words. Benji and Cameron, we promise to never overlook your amazing romance again.

Who is your favorite celebrity couple?

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