Article continues below advertisementCarey Hart Is a Retired Motorcross RacerSource: MEGACarey Hart became a professional racer at 18.Pink found her "True Love" in Carey Hart.While the singer forged a path in the music industry, Hart began making a name for himself as a racer when he was a teen. At 18, he began competing in the AMA Supercross circuit and amazed crowds with daring and death-defying tricks - most notably the "invert superman" seat grab, which later became famously known as the Hart Attack.