The 36-year-old Good Charlotte rocker wished his new wife Cameron Diaz a happy birthday on Monday by posting an adorable selfie with an even cuter caption.
"Happy Birthday to my Beautiful Wife," Madden wrote. "My best friend and Everything else- there's so much I could write. I'm the luckiest guy alive- I get to spend the rest of my life right here. I love this Woman!! Many more Baby!!"
"Thinking bout you," he captioned a pic of the ink. "#LuckyMan."
"The fountain of youth [for me], let's see... I guess it's exercise, healthy diet, lots of water, lots of laughter, lots of sex," she told the magazine. "Yes, sex, we need that as human beings. It's healthy, it's natural, it's what we are here to do!"