That's what friends are for! 

CaCee Cobb took to Instagram Thursday to give Jessica Simpson a funny birthday shout-out by posting an '80s-inspired throwback picture of the best friends.

"#tbt and HAPPY BIRTHDAY to my sweets @jessicasimpson. I love you!" she wrote with the cute candid.

In the hilarious snapshot, Simpson has a shoulder-length 'do while Donald Faison's wife is rocking curly big hair. The longtime friends both are wearing strapless, black and white dresses with matching fingerless Madonna-esque lace gloves. (The picture was taken during Ashlee Simpson's 23rd '80s-themed birthday party in October 2007.)

The newlywed also posted a pic of herself earlier in the day to celebrate her 34th birthday. "And the sun sets on 33," she captioned a fresh-faced honeymoon selfie. 

Jessica's b-day certainly comes at a happy time!

On July 5, she married Eric Johnson in a "magical" ceremony at the luxurious San Ysidro Ranch, located in Montecito, Calif.

The bride and groom exchanged vows in front of their family—including sister Ashlee and fiance Evan Ross—and friends, including Jessica Alba, Cash Warren, Cobb, Donald Faison and Topher Grace.

"We are overwhelmed with complete happiness and love having made our eternal commitment," the couple told People. "To say 'I do' in front of family, friends and, most importantly, our children has been the happiest moment of our lives."

Congrats to the newly-married pair!

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