We actually got two.
The first photo saw Ariana getting a piggyback from Pete. "Happy birthday to the most precious angel on earth! you’re my favorite person that ever existed :) i love you sm," Pete wrote.
The second, which showed the pair in a cute embrace, read, "One more for the queen," he wrote. "Words can’t express what a real f*cking treasure this one is."
Honestly, we're so happy to see Ari get this much love on her b'day!